GUI编程

组件

窗口
弹窗
面板
文本框
列表框
按钮
图片
监听事件
鼠标
键盘事件
破解工具

一、简介

Gui的核心技术: Swing AWT

1.因为界面不美观。
2.需要jre环境!

为什么我们要学习?

可以写出自己心中想要的一些小工具
工作时候，也可能需要维护到swing界面，概率极小!
了解MVC架构，了解监听!

二、AWT

1、Awt介绍

包含了很多类和接口！ Gui:图形用户界面
元素:窗口，按钮，文本框
java.awt包

2、组件和容器

2.1Frame

package com.mike.lesson01;

import java.awt.*;

//GUI的第一个界面
public class TestFrame {
    public static void main(String[] args) {

        //Frame,JDk，看源码
        Frame frame = new Frame("我的第一个Java图形界面窗口");

        //需要设置可见性
        frame.setVisible(true);

        //设置窗口大小
        frame.setSize(400,400);

        //设置背景颜色
        frame.setBackground(new Color(85,150,68));

        //弹出的初始位置
        frame.setLocation(200,200);

        //设置大小固定
        frame.setResizable(false);
    }
}

发现一个问题：窗口无法关闭，只能停止java程序运行

尝试回顾封装

package com.mike.lesson01;

import java.awt.*;

public class TestFrame02 {
    public static void main(String[] args) {
        //展示多个窗口
        MyFrame myFrame1 = new MyFrame(100, 100, 200, 200, Color.blue);
        MyFrame myFrame2 = new MyFrame(300, 100, 200, 200, Color.yellow);
        MyFrame myFrame3 = new MyFrame(100, 300, 200, 200, Color.red);
        MyFrame myFrame4 = new MyFrame(300, 300, 200, 200, Color.MAGENTA);
    }
}

class MyFrame extends Frame{
    static int id = 0;//可能存在多个窗口，我们需要一个计数器

    public MyFrame(int x,int y,int w,int h,Color color){
        super("Myframe+"+(++id));
        setBackground(color);
        setBounds(x, y, w, h);
        setVisible(true);
    }
}

运行截图

2.2面板Panel

同时学习并解决上面提到的不能关闭窗口的问题

package com.mike.lesson01;

import java.awt.*;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

//PaneL可以看成是一个空间， 但是不能单独存在
public class TestPanel {
    public static void main(String[] args) {
        Frame frame = new Frame();

        //布局的概念
        Panel panel = new Panel();

        //设置布局
        frame.setLayout(null);

        //坐标
        frame.setBounds(300,300,500,500);
        frame.setBackground(new Color(40,161,35));

        //panel坐标，相对于frame
        panel.setBounds(50,50,400,400);
        panel.setBackground(new Color(193,15,60));

        //将面板panel放进窗口frame
        //frame.add(panel)
        frame.add(panel);

        //设置窗口可见
        frame.setVisible(true);

        //监听事件，监听窗口关闭事件 System. exit(0)
        frame.addWindowListener(new WindowAdapter() {
            //窗口点击关闭的时候需要做的事情
            @Override
            public void windowClosing(WindowEvent e) {
                //结束程序
                System.exit(0);
            }
        });
    }
}

运行截图

2.3布局管理器

FlowLayout：流式布局管理器
BorderLayout：边界布局管理器
GridLayout：网格布局管理器

流式布局

package com.mike.lesson01;

import java.awt.*;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

public class TestFlowLayout {
    public static void main(String[] args) {
        Frame frame = new Frame("TestFlowLayout");

        //组件-按钮
        Button button1 = new Button("button1");
        Button button2 = new Button("button2");
        Button button3 = new Button("button3");

        //设置为流式布局
        frame.setLayout(new FlowLayout());//默认居中靠上
        //frame.setLayout(new FlowLayout(FlowLayout.LEFT));//靠左
        //frame.setLayout(new FlowLayout(FlowLayout.RIGHT));//靠右



        //设置大小
        frame.setSize(200,200);
        //把按钮添加上去
        frame.add(button1);
        frame.add(button2);
        frame.add(button3);

        //设置可见性
        frame.setVisible(true);

        //监听事件，监听窗口关闭事件 System. exit(0)
        frame.addWindowListener(new WindowAdapter() {
            @Override
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        });

    }
}

边界布局

package com.mike.lesson01;

import java.awt.*;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

public class TestBorderLayout {
    public static void main(String[] args) {
        Frame frame = new Frame("TestBorderLayout");

        Button east = new Button("East");
        Button west = new Button("West");
        Button south = new Button("South");
        Button north = new Button("North");
        Button center = new Button("Center");

        frame.setBounds(666,333,500,500);

        frame.add(east,BorderLayout.EAST);
        frame.add(west,BorderLayout.WEST);
        frame.add(south,BorderLayout.SOUTH);
        frame.add(north,BorderLayout.NORTH);
        frame.add(center,BorderLayout.CENTER);

        frame.setVisible(true);

        //监听事件，监听窗口关闭事件 System. exit(0)
        frame.addWindowListener(new WindowAdapter() {
            @Override
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        });
    }
}

网格布局

package com.mike.lesson01;

import java.awt.*;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

public class TestGridLayout {
    public static void main(String[] args) {
        Frame frame = new Frame("TestGridLayout");

        frame.setBounds(666,333,500,500);

        Button button1 = new Button("button1");
        Button button2 = new Button("button2");
        Button button3 = new Button("button3");
        Button button4 = new Button("button4");
        Button button5 = new Button("button5");
        Button button6 = new Button("button6");

        frame.setLayout(new GridLayout(3,2));

        frame.add(button1);
        frame.add(button2);
        frame.add(button3);
        frame.add(button4);
        frame.add(button5);
        frame.add(button6);

        frame.pack();//Java函数
        frame.setVisible(true);

        //监听事件，监听窗口关闭事件 System. exit(0)
        frame.addWindowListener(new WindowAdapter() {
            @Override
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        });
    }
}

JavaGui总共有八大布局：

FlowLayout：流式布局管理器
BorderLayout：边界布局管理器
GridLayout：网格布局管理器
GridBagLayout：网格组布局管理器
GardLayout：卡片布局管理器
BoxLayout：箱式布局管理器
SpringLayout：弹簧布局管理器

练习ExDemo

package com.mike.lesson01;

import java.awt.*;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

public class ExDemo {

    public static void main(String[] args) {
        //总Frame
        Frame frame = new Frame("ExDemo");
        frame.setSize(400,400);
        frame.setLocation(300,400);
        frame.setVisible(true);
        frame.setBackground(Color.PINK);
        frame.setLayout(new GridLayout(2,1));

        //4个面板
        Panel p1 = new Panel(new BorderLayout());
        Panel p2 = new Panel(new GridLayout(2,1));
        Panel p3 = new Panel(new BorderLayout());
        Panel p4 = new Panel(new GridLayout(2,2));

        //上面
        p1.add(new Button("p1-West-1"),BorderLayout.WEST);
        p1.add(new Button("p1-East-2"),BorderLayout.EAST);
        p2.add(new Button("p1-p2-btn-1"));
        p2.add(new Button("p1-p2-btn-2"));
        p1.add(p2,BorderLayout.CENTER);

        //下面
        p3.add(new Button("p3-West-2"),BorderLayout.WEST);
        p3.add(new Button("p3-East-2"),BorderLayout.EAST);
        //下面中间四个
        for (int i = 1; i <= 4; i++) {
            p4.add(new Button("p3-p4-btn-"+i));
        }
        p3.add(p4,BorderLayout.CENTER);

        frame.add(p1);
        frame.add(p3);

        //监听事件，监听窗口关闭事件 System. exit(0)
        frame.addWindowListener(new WindowAdapter() {
            @Override
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        });
    }
}

运行截图

总结:

Frame是一个顶级窗口
Panel无法单独显示，必须添加到某个容器中。
布局管理器
- 1.流式
  2.东西南北中
  3.表格
大小，定位，背景颜色，可见性，监听!

2.4事件监听

事件监听：当某个事情发生的时候，应该干什么

按钮监听事件

package com.mike.lesson02;

import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

public class TestActionEvent02 {

    public static void main(String[] args) {
        //两个按钮实现同一个监听

        //开始    停止
        Frame frame = new Frame("开始-停止");
        Button button1 = new Button("start");
        Button button2 = new Button("stop");

        //可以显示的定义触发会返回的命令，如果不显示定义，则会走默认的值!
        //可以多个按钮只写一个监听类
        button2.setActionCommand("button2-stop");

        MyMonitor myMonitor = new MyMonitor();
        button1.addActionListener(myMonitor);
        button2.addActionListener(myMonitor);


        frame.add(button1,BorderLayout.NORTH);
        frame.add(button2,BorderLayout.SOUTH);

        frame.pack();
        frame.setVisible(true);

    }
}

//事件监听
class MyMonitor implements ActionListener {
    @Override
    public void actionPerformed(ActionEvent e) {
        // e.getActionCommand() 获得按钮的信息
        System.out.println("按钮被点击了：msg==>"+e.getActionCommand());
        if (e.getActionCommand().equals("start")){
            System.out.println(666666);
        }

    }
}

窗口关闭监听事件

package com.mike.lesson02;

import java.awt.*;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

public class TestWindowClosing {
    public static void main(String[] args) {
        Frame frame = new Frame("TestWindowClosing");

        frame.setBounds(600,600,400,400);

        frame.setBackground(Color.BLUE);

        frame.setVisible(true);

        windowClose(frame);

 //窗口关闭监听事件的写法
====================================================================
/*
		//匿名内部的类写法
         frame.addWindowListener(new WindowAdapter() {
            @Override
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        });
        */
        
===================================================================        
        //继承WindowAdapter重写里面的方法去关闭窗口
//        MyWindowClosing myWindowClosing = new MyWindowClosing();
//        frame.addWindowListener(myWindowClosing);
====================================================================
    }

    //自己写一个关闭窗口的方法，然后可以直接调用（可以把它放进工具类中，反复使用）
    private static void windowClose(Frame frame){
        frame.addWindowListener(new WindowAdapter() {
            @Override
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        });
    }
}

//也可以继承WindowAdapter重写里面的方法去关闭窗口
class MyWindowClosing extends WindowAdapter  {
    @Override
    public void windowClosing(WindowEvent e) {
        System.exit(0);
    }
}

输入框TextField监听事件

package com.mike.lesson02;

import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

public class TestText01 {
    public static void main(String[] args) {
        //启动
        new MyFrame();
    }
}

class MyFrame extends Frame{
    public MyFrame(){
        super("TestText01");
        TextField textField = new TextField();
        add(textField);
        //监听这个文本框输入的文字
        MyActionListener2 myActionListener2 = new MyActionListener2();
        //按Enter就会触发这个输入框的事件
        textField.addActionListener(myActionListener2);

        //设置替换编码
        textField.setEchoChar('*');

        setBounds(600,300,500,200);


        setVisible(true);
//        pack();
        addWindowListener(new WindowAdapter() {
            @Override
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        });
    }
}

class MyActionListener2  implements ActionListener{

    @Override
    public void actionPerformed(ActionEvent e) {
        TextField field = (TextField) e.getSource();//获得一些资源
        System.out.println(field.getText());//获得输入框中的文本
        field.setText("");
    }
    //关闭窗口事件的方法，然后可以直接调用
    private static void windowClose(Frame frame){
        frame.addWindowListener(new WindowAdapter() {
            @Override
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        });
    }
}

练习：制作一个简易计算器，组合+内部类回顾复习!

OOP原则: 组合，大于继承!

目前代码（未优化）

package com.mike.lesson02;

import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

//简易计算器
public class TestCalc {
    public static void main(String[] args) {
        new Calculator();
    }
}

//计算器类
class  Calculator extends Frame{
    public Calculator() {
        super("简易计算器");
        //3个文本框
        TextField num1 = new TextField(10);//字符数
        TextField num2 = new TextField(10);//字符数
        TextField num3 = new TextField(20);//字符数



        //1个按钮

        Button button = new Button("=");
        button.addActionListener(new MyCalculatorListener(num1,num2,num3));


        //1个标签
        Label label = new Label("+");

        //布局
        setLayout(new FlowLayout());

        add(num1);
        add(label);
        add(num2);
        add(button);
        add(num3);

        pack();
        setVisible(true);
    }
}


//监听器类
class MyCalculatorListener implements ActionListener{

    //获取三个变量
    private TextField num1,num2,num3;


    public MyCalculatorListener(TextField num1,TextField num2,TextField num3) {
        this.num1 = num1;
        this.num2 = num2;
        this.num3 = num3;
    }

    @Override
    public void actionPerformed(ActionEvent e) {
        //1.获得加数和被加数
        int n1 = Integer.parseInt(num1.getText());
        int n2 = Integer.parseInt(num2.getText());

        //2.将这个值+法运算后，放到第三个框
        num3.setText(""+(n1+n2));

        //3.清除前两个框
        num1.setText("");
        num2.setText("");

    }


}

完全改造为面向对象的写法

package com.mike.lesson02;

import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

//简易计算器
public class TestCalc {
    public static void main(String[] args) {
        new Calculator().loadFrame();
    }
}

//计算器类
class  Calculator extends Frame{

    //属性
    TextField num1,num2,num3;
    //方法
    public void loadFrame(){

        //3个文本框
         num1 = new TextField(10);//字符数
         num2 = new TextField(10);//字符数
         num3 = new TextField(20);//字符数
        //1个按钮
        Button button = new Button("=");
        //1个标签
        Label label = new Label("+");

        button.addActionListener(new MyCalculatorListener(this));

        //布局
        setLayout(new FlowLayout());

        add(num1);
        add(label);
        add(num2);
        add(button);
        add(num3);

        pack();
        setTitle("简易计算器");
        setVisible(true);
    }
}

//监听器类
class MyCalculatorListener implements ActionListener{

    //获取计算器这个对象,在一个类中组合另外一个类;
    Calculator calculator = null;

    public MyCalculatorListener(Calculator calculator) {
        this.calculator = calculator;
    }

    @Override
    public void actionPerformed(ActionEvent e) {
        //1.获得加数和被加数
        int n1 = Integer.parseInt(calculator.num1.getText());
        int n2 = Integer.parseInt(calculator.num2.getText());
        //2.将这个值+法运算后，放到第三个框
        calculator.num3.setText(""+(n1+n2));
        //3.清除前两个框
        calculator.num1.setText("");
        calculator.num2.setText("");
    }
}

继续优化，改造成一个内部类：

内部类最大的好处，就是可以畅通无阻的访问外部的属性和方法!

package com.mike.lesson02;

import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

//简易计算器
public class TestCalc {
    public static void main(String[] args) {
        new Calculator().loadFrame();
    }
}

//计算器类
class  Calculator extends Frame{
//===========================================================================
    //属性
    TextField num1,num2,num3;
    //方法
    public void loadFrame(){

        //3个文本框
         num1 = new TextField(10);//字符数
         num2 = new TextField(10);//字符数
         num3 = new TextField(20);//字符数
        //1个按钮
        Button button = new Button("=");
        //1个标签
        Label label = new Label("+");

        button.addActionListener(new MyCalculatorListener());

        //布局
        setLayout(new FlowLayout());

        add(num1);
        add(label);
        add(num2);
        add(button);
        add(num3);

        pack();
        setTitle("简易计算器");
        setVisible(true);
    }
//===========================================================================
    //监听器类
    //内部类最大的好处，就是可以畅通无阻的访问外部的属性和方法!
    private class MyCalculatorListener implements ActionListener{


        @Override
        public void actionPerformed(ActionEvent e) {
            //1.获得加数和被加数
            int n1 = Integer.parseInt(num1.getText());
            int n2 = Integer.parseInt(num2.getText());
            //2.将这个值+法运算后，放到第三个框
            num3.setText(""+(n1+n2));
            //3.清除前两个框
            num1.setText("");
            num2.setText("");
        }
    }
//===========================================================================
}

画笔

package com.mike.lesson03;

import java.awt.*;

public class TestPaint {
    public static void main(String[] args) {
        new MyPaint().loadFrame();
    }
}

class MyPaint extends Frame{

    public void loadFrame(){
        setBounds(200,200,600,500);
        setVisible(true);
    }



    //画笔
    @Override
    public void paint(Graphics g) {
        //画笔，需要有颜色，画笔可以画画
        //g.setColor(Color.RED);
        //g.drawOval(100,100,100,100);//空心的圆
        g.fillOval(100,100,100,100);//实心的圆

       // g.setColor(Color.GREEN);
        g.fillRect(150,200,200,200);

        //养成习惯，画笔用完，将他还原到最初的颜色
    }
}

鼠标监听

目的：想要实现鼠标画画!

package com.mike.lesson03;


import java.awt.*;
import java.awt.event.*;
import java.util.ArrayList;
import java.util.Iterator;

//鼠标监听事件
public class TestMouseListener {
    public static void main(String[] args) {
        new MyFrame("画图");
    }

}

//自己的类
class MyFrame extends Frame{
    //画画需要画笔，需要监听鼠标当前的位置，需要集合来存储这些点
    ArrayList points;

    public MyFrame(String title){
        super(title);
        setBounds(200,200,400,300);

        //存鼠标存储的点
        points = new  ArrayList<>();


        setVisible(true);
        //鼠标监听器，针对这个窗口
        this.addMouseListener(new MyMouseListener());

        addWindowListener(new WindowAdapter() {
            @Override
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        });


    }

    @Override
    public void paint(Graphics g) {
        //画画，监听鼠标的事件
        Iterator iterator = points.iterator();
        while (iterator.hasNext()){
            Point point = (Point) iterator.next();
            g.setColor(Color.BLUE);
            g.fillOval(point.x,point.y,10,10);
        }
    }

    //添加一个点到集合中
    public void addPaint(Point point){
        points.add(point);
    }



    //适配器模式
    private class MyMouseListener extends MouseAdapter{
        @Override
        public void mousePressed(MouseEvent e) {
            MyFrame frame = (MyFrame) e.getSource();
            //这个我们点击的时候，就会在界面上产生一个点!画
            //这个点就是鼠标的点;
            frame.addPaint(new Point(e.getX(),e.getY()));

            //每次点击鼠标都需要重新画一遍
            frame. repaint();//刷新

        }
    }

}

窗口监听

package com.mike.lesson03;

import jdk.nashorn.internal.runtime.Source;

import java.awt.*;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

public class TestWindow {
    public static void main(String[] args) {
        new WindowFrame("TestWindow");
//        new WindowFrame();
    }
}

class WindowFrame extends Frame {
    public WindowFrame(String litter) {
        super(litter);
        setBackground(Color.BLUE);
        setBounds(600, 300, 400, 400);
        setVisible(true);

        addWindowListener(new WindowAdapter() {
            @Override
            public void windowClosing(WindowEvent e) {
                System.out.println("windowClosing");
                System.exit(0);
            }

            //窗口被激活
            @Override
            public void windowActivated(WindowEvent e) {
//                WindowFrame source = (WindowFrame) e.getSource();
//                source.setTitle("windowActivated被激活了");
                System.out.println("windowActivated");
            }
        });
    }
}

键盘监听

package com.mike.lesson03;

import java.awt.*;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;

public class TestKeyListener {
    public static void main(String[] args) {
        new KeyFrame();
    }
}
class KeyFrame extends Frame{
    public KeyFrame() {
        setBounds(1,2,300,400);
        setVisible(true);

        this.addKeyListener(new KeyAdapter() {
            //键盘按下
            @Override
            public void keyPressed(KeyEvent e) {
                //获得键盘下的键是哪一个,获得当前的码
                int keyCode = e.getKeyCode();//不需需要去记录这个数值，直接使用静态属性VK_ XXX
                System.out.println(keyCode);
                if (keyCode==KeyEvent.VK_UP){
                    System.out.println("你按下了上键");
                }
                //根据按下不同操作，产生不同结果;
                
            }
        });
    }
}

三、Swing

1、窗口、面板

初始化init（）

package com.mike.lesson04;

import javax.swing.*;
import java.awt.*;

public class JFrameDemo {
    //init();初始化
    public void init(){
        //顶级窗口
        JFrame jFrame = new JFrame("这是一个JFrame窗口");
        jFrame.setVisible(true);
        jFrame.setBounds(100,100,200,200);
        jFrame.setBackground(Color.PINK);

        //设置文字
        JLabel label = new JLabel("你好！世界！");

        jFrame.add(label);

        //关闭窗口事件
        jFrame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

    }

    public static void main(String[] args) {
        new JFrameDemo().init();

    }
}

2、标签居中

package com.mike.lesson04;

import javax.swing.*;
import java.awt.*;

public class JFrameDemo02 {
    public static void main(String[] args) {
        new MyFrame2().init();
    }

}

class MyFrame2 extends JFrame{
    public void init(){
        this.setBounds(100,100,200,200);
        this.setVisible(true);

        //设置文字
        JLabel label = new JLabel("你好！世界！");
        add(label);

        //让文本标签居中   设置水平对齐
        label.setHorizontalAlignment(SwingConstants.CENTER);

        //获得一个容器
        Container container = this.getContentPane();
        container.setBackground(Color.RED);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }
}

3、设置弹窗JDialog

JDialog,用来被弹出，默认就有关闭事件!

package com.mike.lesson04;

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

//主窗口
public class DialogDemo extends JFrame {
    public DialogDemo() {
        this.setVisible(true);
        this.setSize(700,500);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

        //JFrame放东西，容器
        Container container = this.getContentPane();
        //绝对布局
        container.setLayout(null);

        //按钮
        JButton jButton = new JButton("点击弹出一个对话框");//创建
        jButton.setBounds(30,30,200,50);

        //点击这个按钮的时候，弹出一个弹窗
        jButton.addActionListener(new ActionListener() {//监听器
            @Override
            public void actionPerformed(ActionEvent e) {
                //弹窗
                new MyDialogDemo();
            }
        });

        container.add(jButton);
    }

    public static void main(String[] args) {
        new DialogDemo();
    }
}

//弹窗窗口
class MyDialogDemo extends JDialog{
    public MyDialogDemo() {
        this.setVisible(true);
        this.setBounds(100,100,500,500);
        //弹窗默认就有关闭窗口，不需要再设置，这是多余的操作
        //this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

        Container container = this.getContentPane();
        container.setLayout(null);

        JLabel jLabel = new JLabel("你好！地球！");
        jLabel.setBounds(200,200,200,200);
        container.add(jLabel);

//        container.add(new JLabel("你好！地球！"));

    }
}

4、标签

1、label

new JLabel("xxx");

2、图标ICON

package com.mike.lesson04;

import javax.swing.*;
import java.awt.*;
import java.net.URL;

public class ImagIconDemo extends JFrame {

    public ImagIconDemo(){

        //获取图片的地址
        JLabel label = new JLabel("ImagIcon");
        URL url = ImagIconDemo.class.getResource("01.jpg");

        ImageIcon imageIcon = new ImageIcon(url);
        label.setIcon(imageIcon);

        label.setHorizontalAlignment(SwingConstants.CENTER);

        Container container = this.getContentPane();
        container.add(label);
        container.setBackground(Color.PINK);
        this.setTitle("ImagIconDemo");
        this.setBounds(500,500,500,500);
        this.setVisible(true);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {
        new ImagIconDemo();
    }
}

5、面板

1.1、JPanel

package com.mike.lesson05;

import javax.swing.*;
import java.awt.*;

public class JPanelDemo extends JFrame {
    public JPanelDemo(String litter) {
        super(litter);
        Container container = this.getContentPane();

        container.setLayout(new GridLayout(2,2,10,10));//后面的参数，间距的意思

        JPanel panel1 = new JPanel(new GridLayout(1,3));
        JPanel panel2 = new JPanel(new GridLayout(1,2));
        JPanel panel3 = new JPanel(new GridLayout(2,1));
        JPanel panel4 = new JPanel(new GridLayout(3,2));

        panel1.add(new JButton("1-1"));
        panel1.add(new JButton("1-2"));
        panel1.add(new JButton("1-3"));

        panel2.add(new JButton("2-1"));
        panel2.add(new JButton("2-2"));

        panel3.add(new JButton("3-1"));
        panel3.add(new JButton("3-2"));

        panel4.add(new JButton("4-1"));
        panel4.add(new JButton("4-2"));
        panel4.add(new JButton("4-3"));
        panel4.add(new JButton("4-4"));
        panel4.add(new JButton("4-5"));
        panel4.add(new JButton("4-6"));

        container.add(panel1);
        container.add(panel2);
        container.add(panel3);
        container.add(panel4);

        container.setBackground(Color.PINK);

        this.setVisible(true);
//        this.pack();
        this.setBounds(500,500,500,500);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {
        new JPanelDemo("JPanelDemo");
    }
}

1.2、JScroll

package com.mike.lesson05;

import javax.swing.*;
import java.awt.*;

public class JScrollDemo extends JFrame {
    public JScrollDemo(String title) {
        super(title);
        Container container = this.getContentPane();

        //文本域
        JTextArea textArea = new JTextArea(20,50);
        textArea.setText("你好！宇宙！");

        //Scroll面板(如果超出窗口大小就会出现滚动条)
        JScrollPane scrollPane = new JScrollPane(textArea);
        
        container.add(scrollPane);

        this.setVisible(true);
        this.setBounds(100,100,300,350);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {
        new JScrollDemo("JScrollDemo");
    }
}

6、按钮

图片按钮
单选按钮
多选按钮

1、图片按钮

package com.mike.lesson05;

import javax.swing.*;
import java.awt.*;
import java.net.URL;

public class JButtonDemo01 extends JFrame {

    public JButtonDemo01(String title) {
        super(title);
        Container container = this.getContentPane();
        //将一个图片变为一个图标
        URL url = JButtonDemo01.class.getResource("01.jpg");
        Icon icon = new ImageIcon(url);

        //把这个图标放在按钮上
        JButton button = new JButton();
        button.setIcon(icon);
        button.setToolTipText("图片按钮");

        //add
        container.add(button);

        this.setVisible(true);
        this.setBounds(500,500,500,500);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {
        new JButtonDemo01("JButtonDemo01");
    }
}

2、单选按钮

package com.mike.lesson05;

import javax.swing.*;
import java.awt.*;
import java.net.URL;

public class JButtonDemo02 extends JFrame {

    public JButtonDemo02(String title) {
        super(title);
        Container container = this.getContentPane();
        //将一个图片变为一个图标
        URL url = JButtonDemo01.class.getResource("01.jpg");
        Icon icon = new ImageIcon(url);

        //单选框
        JRadioButton radioButton1 = new JRadioButton("JRadioButton01");
        JRadioButton radioButton2 = new JRadioButton("JRadioButton02");
        JRadioButton radioButton3 = new JRadioButton("JRadioButton03");

        //由于单选框只能选择一个， 分组，一个组只能选择一个
        ButtonGroup group = new ButtonGroup();
        group.add(radioButton1);
        group.add(radioButton2);
        group.add(radioButton3);

        container.add(radioButton1,BorderLayout.CENTER);
        container.add(radioButton2,BorderLayout.NORTH);
        container.add(radioButton3,BorderLayout.SOUTH);

        this.setVisible(true);
//        this.setSize(500,300);
        this.setBounds(500,500,500,500);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {
        new JButtonDemo02("JButtonDemo02");
    }
}

3、多选按钮

package com.mike.lesson05;

import javax.swing.*;
import java.awt.*;
import java.net.URL;

public class JButtonDemo03 extends JFrame {

    public JButtonDemo03(String title) {
        super(title);
        Container container = this.getContentPane();
        //将一个图片变为一个图标
        URL url = JButtonDemo01.class.getResource("01.jpg");
        Icon icon = new ImageIcon(url);

        //多选框
        JCheckBox checkBox01 = new JCheckBox("checkBox01");
        JCheckBox checkBox02 = new JCheckBox("checkBox02");

        container.add(checkBox01,BorderLayout.NORTH);
        container.add(checkBox02,BorderLayout.SOUTH);



        this.setVisible(true);
//        this.setSize(500,300);
        this.setBounds(500,500,500,500);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {
        new JButtonDemo03("JButtonDemo03");
    }
}

7、列表

下拉框
列表框

1、下拉框

package com.mike.lesson06;


import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

public class TestComboBoxDemo01 extends JFrame {
    public TestComboBoxDemo01(String title) {
        super(title);
        //先拿容器container
        Container container = this.getContentPane();


        JComboBox status = new JComboBox();

        status.addItem(null);
        status.addItem("正在热映");
        status.addItem("即将上映");
        status.addItem("已下架");

        //监听下拉框的内容
        status.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                JComboBox status = (JComboBox) e.getSource();//获得一些资源
                System.out.println(status.getSelectedIndex());//返回项数
                System.out.println(status.getSelectedItem());//获得输入框中的文本
            }
        });

        container.add(status);

        this.setVisible(true);
        this.setBounds(200,200,500,300);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

    }

    public static void main(String[] args) {
        new TestComboBoxDemo01("TestComboBoxDemo01");
    }
}

2、列表框

package com.mike.lesson06;

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Vector;

public class TestComboBoxDemo02 extends JFrame {
    public TestComboBoxDemo02(String title) {
        super(title);
        //先拿容器container
        Container container = this.getContentPane();

        //生成列表的内容
        //这是静态的设置变量值
//        String[] contents ={"1","2","3"};
        //vector是一个集合，可以动态的设置变量值
        Vector contents = new Vector<>();
        //列表中需要放入内容

        JList jList = new JList(contents);


        contents.add("ZhangSan");
        contents.add("LiSi");
        contents.add("WangWu");

        container.add(jList);

        this.setVisible(true);
        this.setBounds(200,200,500,300);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {
        new TestComboBoxDemo02("TestComboBoxDemo02");
    }
}

下拉框应用场景
- 级联选项
- 选择地区，或者一些单个选项
列表框应用场景
- 列表，展示信息，一般是动态扩容

8、文本框

文本框
密码框
文本域

1、文本框

package com.mike.lesson06;

import javax.swing.*;
import java.awt.*;
import java.util.Vector;

public class TestTextDemo01 extends JFrame {
    public TestTextDemo01(String title) {
        super(title);
        //先拿容器container
        Container container = this.getContentPane();

        JTextField textField1 = new JTextField("Hello");
        JTextField textField2 = new JTextField("Word",20);

        container.add(textField1,BorderLayout.NORTH);
        container.add(textField2,BorderLayout.SOUTH);

        this.setVisible(true);
        this.setBounds(200,200,500,300);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

    }

    public static void main(String[] args) {
        new TestTextDemo01("文本框");
    }
}

2、密码框

package com.mike.lesson06;

import javax.swing.*;
import java.awt.*;

public class TestTextDemo02 extends JFrame {
    public TestTextDemo02(String title) {
        super(title);
        //先拿容器container
        Container container = this.getContentPane();

        JPasswordField passwordField = new JPasswordField();//默认为*
        passwordField.setEchoChar('*');
        
        container.add(passwordField);

        this.setVisible(true);
        this.setBounds(200,200,500,300);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

    }

    public static void main(String[] args) {
        new TestTextDemo02("密码框");
    }
}

3、文本域

package com.mike.lesson05;

import javax.swing.*;
import java.awt.*;

public class JScrollDemo extends JFrame {
    public JScrollDemo(String title) {
        super(title);
        Container container = this.getContentPane();

        //文本域
        JTextArea textArea = new JTextArea(20,50);
        textArea.setText("你好！宇宙！");

        //Scroll面板(如果超出窗口大小就会出现滚动条)
        JScrollPane scrollPane = new JScrollPane(textArea);

        container.add(scrollPane);

        this.setVisible(true);
        this.setBounds(100,100,300,350);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {
        new JScrollDemo("JScrollDemo");
    }
}

posted @ 2022-03-03 19:40 海边蓝贝壳阅读(16) 评论(0) 编辑收藏举报

刷新页面返回顶部

海边蓝贝壳

GUI编程

GUI编程

一、 简介

二、AWT

1、Awt介绍

2、组件和容器

2.1Frame

2.2面板Panel

2.3布局管理器

流式布局

边界布局

网格布局

2.4事件监听

按钮监听事件

窗口关闭监听事件

输入框TextField监听事件

练习：制作一个简易计算器，组合+内部类回顾复习!

画笔

鼠标监听

窗口监听

键盘监听

三、Swing

1、窗口、面板

2、标签居中

3、设置弹窗JDialog

4、标签

1、label

2、图标ICON

5、面板

1.1、JPanel

1.2、JScroll

6、按钮

1、图片按钮

2、单选按钮

3、多选按钮

7、列表

1、下拉框

2、列表框

8、文本框

1、文本框

2、密码框

3、文本域

公告

一、简介