JavaGUI编程

GUI编程

一、简介

GUI：图形用户界面（Graphical User Interface，简称 GUI，又称图形用户接口）是指采用图形方式显示的计算机操作用户界面。

GUI核心开发技术：Swing、GUI；

缺点：见面不够美观、需要jre环境；

为什么要去学习？-------------->可以学习MVC架构思想、还可以写一些小工具、了解监听器

二、AWT

2.1、AWT简介

AWT(Abstract Window Toolkit)：文译为抽象窗口工具包，该包提供了一套与本地图形界面进行交互的接口，是Java提供的用来建立和设置Java的图形用户界面的基本工具。

本质就是：new 类！；因为AWT中包含了许多的类和接口！

包含各种元素：窗口、按钮、文本框

java.awt

2.2、组件和容器

1、Frame

/**
 * GUI的第一个界面
 */
public class TestFrame {
    public static void main(String... args) {
        /**
         * Frame，看源码
         */
        Frame frame = new Frame("第一个图形界面");

        //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(205, 255, 228));
        //弹出的初始位置
        frame.setLocation(220,200);
        //固定大小
        frame.setResizable(false);
    }
}

问题：发现窗口关闭不掉，停止Java程序！

尝试回顾封装：

public class TestFrame2 {
    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.green);
    }
}
//封装类
class MyFrame extends Frame{
    static int id = 0;//可能存在多个窗口id，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);
    }
}

2、面板Panel

解决关闭事件！

//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(255, 189, 253));

        //Panel坐标设置，相对于frame
        panel.setBounds(50,50,400,400);
        panel.setBackground(new Color(114, 253, 255));

        //frame.add(panel)
        frame.add(panel);
        frame.setVisible(true);

        //监听事件，监听窗口关闭事件
        //适配器模式：
        frame.addWindowListener(new WindowAdapter() {
            //窗口点击关闭需要做的事情
            @Override
            public void windowClosing(WindowEvent e) {
               //关闭程序
                System.exit(0);
            }
        });
    }
}

3、三种布局管理器

• 流式布局-------->左右结构

public class TestFlowLayout {
    public static void main(String[] args) {
        Frame frame = new Frame();
        
        //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
        frame.setLayout(new FlowLayout(FlowLayout.CENTER));//居中
//        frame.setLayout(new FlowLayout(FlowLayout.TRAILING));//居后
//        frame.setLayout(new FlowLayout(FlowLayout.LEFT));//居左
//        frame.setLayout(new FlowLayout(FlowLayout.RIGHT));//居右
//        frame.setLayout(new FlowLayout(FlowLayout.LEADING));//居前
        frame.setSize(200,200);

        frame.add(button1);
        frame.add(button2);
        frame.add(button3);

        frame.setVisible(true);
    }
}

• 东西南北中

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.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.setSize(200,200);
        frame.setVisible(true);
    }
}

• 表格布局

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

        Button btn1 = new Button("btn1");
        Button btn2 = new Button("btn2");
        Button btn3 = new Button("btn3");
        Button btn4 = new Button("btn4");
        Button btn5 = new Button("btn5");
        Button btn6 = new Button("btn6");

        frame.setLayout(new GridLayout(3,2,0,0));

        frame.add(btn1);
        frame.add(btn2);
        frame.add(btn3);
        frame.add(btn4);
        frame.add(btn5);
        frame.add(btn6);

        frame.pack();//java函数！能够自动选择一个最优的布局样式
        frame.setVisible(true);
    }
}

• 综合实例

//案例练习
public class Demo {
    public static void main(String[] args) {
        Frame frame = new Frame("混合布局");
        frame.setSize(400,300);
        frame.setLocation(300,400);
        frame.setBackground(new Color(205, 255, 228));
        frame.setVisible(true);
        //分成上下两个部分
        frame.setLayout(new GridLayout(2,1));

        //四个面板
        Panel panel1 = new Panel(new BorderLayout());
        Panel panel2 = new Panel(new GridLayout(2,1));
        Panel panel3 = new Panel(new BorderLayout());
        Panel panel4 = new Panel(new GridLayout(2,2));

        //上半部分
        panel1.add(new Button("East-1"),BorderLayout.EAST);
        panel1.add(new Button("West-1"),BorderLayout.WEST);
        panel2.add(new Button("p2-btn1-1"));
        panel2.add(new Button("p2-btn1-2"));
        panel1.add(panel2,BorderLayout.CENTER);

        //下半部分
        panel3.add(new Button("East-2"),BorderLayout.EAST);
        panel3.add(new Button("West-2"),BorderLayout.WEST);
        for(int i=1;i<=4;i++){
            panel4.add(new Button("p4-btn2-"+i));
        }
        panel3.add(panel4,BorderLayout.CENTER);

        frame.add(panel1);
        frame.add(panel3);
        
        frame.addWindowListener(new WindowAdapter() {
            @Override
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        });
    }
}

• 总结

1、Frame是一个最高级窗口

2、panel无法单独显示，必须添加到某个容器中

2.3、事件监听

事件监听:当某个事件发生时，应该干什么

public class TestActionEvent {
    public static void main(String[] args) {
        //按下按钮，触发事件
        Frame frame = new Frame();
        Button button = new Button("button");

        //因为addActionListener()需要一个ActionListener,所以我们需要构造一个ActionListener
        MyActionListener myActionListener = new MyActionListener();
        button.addActionListener(myActionListener);

        frame.add(button,BorderLayout.CENTER);
        frame.pack();
        frame.setVisible(true);

        windowClose(frame);
    }
    //关闭窗体的事件
    private static void windowClose(Frame frame){
        frame.addWindowListener(new WindowAdapter() {
            @Override
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        });
    }
}
//事件监听
class MyActionListener implements ActionListener{

    @Override
    public void actionPerformed(ActionEvent actionEvent) {
        System.out.println("你点击了！");
    }
}

多个按钮，共享一个监听事件

public class TestActionTwo {
    public static void main(String[] args) {
        //两个按钮，实现同一个监听
        //开始     结束
        Frame frame = new Frame("开始-结束");
        Button button1 = new Button("开始");
        Button button2 = new Button("结束");

        //显示所定义的触发会返回的命令
        //可以多个按钮实现一个监听器
        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);
    }
}
class MyMonitor implements ActionListener{

    @Override
    public void actionPerformed(ActionEvent e) {
        //e.getActionCommand()获取按钮上的一些信息
        System.out.println("按钮被点击了：msg:"+e.getActionCommand());
    }
}

2.4、输入框事件监听

public class TestTextField {
    public static void main(String[] args) {
        //main方法里面只管启动！
        new MyFrame();
    }
}
class MyFrame extends Frame{
    public MyFrame(){
        TextField textField = new TextField();
        add(textField);

        //监听这个文本框输入的文字
        MyActionListener2 myActionListener2 = new MyActionListener2();
        //按下enter，就会触发这个输入框事件
        textField.addActionListener(myActionListener2);
        //设置替换编码
        textField.setEchoChar('*');

        pack();
        setVisible(true);
    }
}
class MyActionListener2 implements ActionListener{

    @Override
    public void actionPerformed(ActionEvent e) {
        TextField test = (TextField)e.getSource();//获取资源,返回的一个对象
        System.out.println(test.getText());//获得输入框中的文本
        test.setText("");
    }
}

2.5、简单计算器 组合+内部类回顾！

OOP原则：组合，大于继承

---

面向过程的代码写法

//未优化代码
//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(){
        //3个文本框
        TextField num1 = new TextField(10);
        TextField num2 = new TextField(10);
        TextField num3 = new TextField(20);

        //一个按钮
        Button button = new Button("=");
        MyCalculatorListener myCalculatorListener = new MyCalculatorListener(num1,num2,num3);
        button.addActionListener(myCalculatorListener);
        //一个标签
        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) {
        //获取加数和被加数
        int n1 = Integer.parseInt(num1.getText());
        int n2 = Integer.parseInt(num2.getText());

        //将这个值加法运算后，放到第三个框
        num3.setText(""+(n1+n2));
        //清除前两个框
        num1.setText("");
        num2.setText("");
    }
}

---

完全改造为面向对象写法

//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);
        num2 = new TextField(10);
        num3 = new TextField(20);
        //一个标签
        Label label = new Label("+");
        //一个按钮
        Button button = new Button("=");
        MyCalculatorListener myCalculatorListener = new MyCalculatorListener(this);
        button.addActionListener(myCalculatorListener);

        //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{

    //获取计算器这个对象,在一个类中组合另一个类
    Calculator calculator = null;
    public MyCalculatorListener(Calculator calculator){
        this.calculator=calculator;
    }

    @Override
    public void actionPerformed(ActionEvent e) {
        //获取加数和被加数
        int m1 = Integer.parseInt(calculator.num1.getText());
        int m2 = Integer.parseInt(calculator.num2.getText());

        //将这个值加法运算后，放到第三个框
        calculator.num3.setText(""+(m1+m2));
        //清除前两个框
        calculator.num1.setText("");
        calculator.num2.setText("");
    }
}

---

内部类

• 更好的包装

//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);
        num2 = new TextField(10);
        num3 = new TextField(20);
        //一个标签
        Label label = new Label("+");
        //一个按钮
        Button button = new Button("=");
        MyCalculatorListener myCalculatorListener = new MyCalculatorListener();
        button.addActionListener(myCalculatorListener);

        //布局
        setLayout(new FlowLayout());

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

        pack();
        setVisible(true);
    }
    //监听器类
    //内部类最大的好处就是能够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) {
            //获取加数和被加数
            int m1 = Integer.parseInt(num1.getText());
            int m2 = Integer.parseInt(num2.getText());

            //将这个值加法运算后，放到第三个框
            num3.setText(""+(m1+m2));
            //清除前两个框
            num1.setText("");
            num2.setText("");
        }
    }
}

2.6、画笔

public class TestPaint {
    public static void main(String[] args) {
        new MyPaint().LoadFrame();
    }
}
class MyPaint extends Frame{
    public void LoadFrame(){
        setBounds(200,200,600,400);
        setVisible(true);
    }
    @Override
    public void paint(Graphics g) {
        //画笔，需要有颜色
        g.setColor(Color.BLUE);
       // g.drawOval(100,100,100,100);
        g.fillOval(250,250,200,200);//实心圆
        
       // g.setColor(Color.GREEN);
        g.fillRect(100,100,200,150);

        //用完画笔，将其还原最开始的样式
    }
}

---

2.7、鼠标监听

目的：简单实现鼠标画画！

//鼠标监听事件
public class TestMouseListener {
    public static void main(String[] args) {
        new MyFrame("画图");
    }
}
//自己所写的类
class MyFrame extends Frame{
    ArrayList points;
    //画画需要画笔，需要去监听鼠标当前的位置，需要集合来存储
    public MyFrame(String title){
        super(title);
        setBounds(200,200,400,300);
        //存储鼠标点击的点
        points = new ArrayList<>();

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

    @Override
    public void paint(Graphics g) {
        //画画，需要监听鼠标的事件
        Iterator it = points.iterator();
        while(it.hasNext()){
            Point point = (Point)it.next();
            g.setColor(Color.BLUE);
            g.fillOval(point.x,point.y,10,10);
        }
    }
    //添加一个点到界面上
    public void addPaint(Point point){
        points.add(point);
    }
    //适配器模式
    private class MyMouseListener extends MouseAdapter {
        //鼠标 按下、弹起、按住不放
        @Override
        public void mousePressed(MouseEvent e) {
            MyFrame frame = (MyFrame)e.getSource();
            //这里我们点击时，就会在界面上产生一个点
            //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
        }
    }
}

---

2.8、窗口监听

public class TestWindow {
    public static void main(String[] args) {
        new WindowFrame();
    }
}
class WindowFrame extends Frame {
    public WindowFrame() {
        setBackground(Color.blue);
        setBounds(100, 100, 200, 200);
        setVisible(true);
        // addWindowListener(new MyWindowListener());
        this.addWindowListener(new WindowAdapter() {
            //匿名内部类

            @Override
            public void windowClosing(WindowEvent e) {//关闭窗口
                System.out.println("windowClosing");
                System.exit(0);
            }

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

        });
//        class MyWindowListener extends WindowAdapter {
//            @Override
//            public void windowClosing(WindowEvent e) {
//                setVisible(false);//隐藏窗口，通过按钮，隐藏窗口
//                System.exit(0);//正常退出
//            }
//        }
    }
}

运行测试，得出结果

---

2.9、键盘监听

//键
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) {
                //获取键盘按的是那个键，当前的码
                int keyCode = e.getKeyCode();//不需要去记录这个值，直接使用静态属性VK_XX
                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

3.1、窗口、面板

public class JFrameDemo {
    //init();初始化
    public void init(){
        //JFrame为一个顶级窗口
        JFrame jf = new JFrame("这是一个JFrame窗口");
        jf.setVisible(true);
        jf.setBounds(100,100,200,200);

        //设置文字 JLable
        JLabel label = new JLabel("欢迎学习GUI");
        jf.add(label);
        
        //关闭事件
        jf.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }
    public static void main(String[] args) {
        //建立一个窗口
        new JFrameDemo().init();
    }
}

---

背景颜色、标签居中

public class JFrameDemo02 {
    public static void main(String[] args) {
        new MyJFrame2().init();
    }
}
class MyJFrame2 extends JFrame{
    public void init(){
        this.setBounds(10,10,200,300);
        this.setVisible(true);
        //设置文字 JLable
        JLabel label = new JLabel("欢迎学习GUI");
        this.add(label);
        //让文本标签居中
        label.setHorizontalAlignment(SwingConstants.CENTER);
        //获得一个容器
        Container container = this.getContentPane();
        container.setBackground(Color.yellow);
    }
}

---

3.2、弹窗

JDialog,用来被弹出，默认就有关闭事件！

//主窗口
public class DialogDemo extends JFrame {
    public DialogDemo(){
        this.setVisible(true);
        this.setSize(700,500);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        //JFrame  容器
        Container container = this.getContentPane();
        //绝对布局
        container.setLayout(null);//固定窗口位置，绝对布局
        //按钮
        JButton button = new JButton("点击弹出一个对话框");
        button.setBounds(30,30,200,50);

        //点击此按钮，弹出一个弹窗出来
        button.addActionListener(new ActionListener() {//监听器
            @Override
            public void actionPerformed(ActionEvent actionEvent) {
                //弹窗
                new MyDialogDemo();
            }
        });

        container.add(button);
    }

    public static void main(String[] args) {
        new DialogDemo();
    }
}
//弹窗的窗口
class MyDialogDemo extends JDialog {
    public MyDialogDemo() {
        this.setVisible(true);
        this.setBounds(100,100,500,500);

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

---

3.3、标签

Lable

new Lable("文字");

图标 Icon

//图标，需要实现类，JFrame继承
public class IconDemo extends JFrame implements Icon {
    private int width;
    private int height;

    public IconDemo(){}//无参构造

    public IconDemo(int width,int height){//有参构造
        this.width=width;
        this.height=height;
}

    public void init(){
        IconDemo iconDemo = new IconDemo(15, 15);
        //图标放在标签上，也可以放在按钮上
        JLabel label = new JLabel("icontest", iconDemo, SwingConstants.CENTER);

        Container container = this.getContentPane();
        container.add(label);

        this.setVisible(true);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

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

    @Override
    public void paintIcon(Component component, Graphics g, int x, int y) {
        g.fillOval(x,y,width,height);
    }

    @Override
    public int getIconWidth() {
        return this.width;
    }

    @Override
    public int getIconHeight() {
        return this.height;
    }
}

图片图标 ImageIcon

public class ImageIconDemo extends JFrame {
    public ImageIconDemo(){
        //获取图片地址
        JLabel label = new JLabel("ImageIcon");

        //ImageIconDemo.class.getResource("tx.jpg"):直接获取当前类路径下Class的资源
        ImageIcon imageIcon = new ImageIcon(ImageIconDemo.class.getResource("tx.jpg"));
        label.setIcon(imageIcon);
        label.setHorizontalAlignment(SwingConstants.CENTER);

        Container container = this.getContentPane();
        container.add(label);

        setVisible(true);
        setBounds(100,100,300,300);
        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }
    public static void main(String[] args) {
        new ImageIconDemo();
    }
}

---

3.4、面板

JPanel

public class TestJPanel extends JFrame {
    public TestJPanel() {
        Container container = this.getContentPane();
        container.setLayout(new GridLayout(2,1,10,10));//后面两个参数表示间距

        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"));
        panel1.add(new JButton("1"));
        panel1.add(new JButton("1"));

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

        panel3.add(new JButton("3"));
        panel3.add(new JButton("3"));

        panel4.add(new JButton("4"));
        panel4.add(new JButton("4"));
        panel4.add(new JButton("4"));
        panel4.add(new JButton("4"));
        panel4.add(new JButton("4"));
        panel4.add(new JButton("4"));

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

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

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

JScrollPanel

public class TestJScrollPanel extends JFrame {
    public TestJScrollPanel() {
        Container container = this.getContentPane();

        //文本域
        JTextArea textArea = new JTextArea(20,50);
        textArea.setText("欢迎学习GUI");

        //JScrollPanel
        JScrollPane scrollPane = new JScrollPane(textArea);

        container.add(scrollPane);

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

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

---

3.5、按钮

图片按钮

public class JButtonDemo01 extends JFrame {
    public JButtonDemo01(){
        Container container = this.getContentPane();

        //将一个图片变为图标
        Icon icon = new ImageIcon(JButtonDemo01.class.getResource("tx1.jpg"));

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

        container.add(button);

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

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

单选按钮

public class JButtonDemo02  extends JFrame {
    public JButtonDemo02(){
        Container container = this.getContentPane();

        //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，分组一个组中只能选择一个
        //但是如果我们去掉分组，则可以实现多选，但多选框是另外一个名字
        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.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

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

复选按钮

public class JButtonDemo03 extends JFrame {
    public JButtonDemo03(){
        Container container = this.getContentPane();

        //多选框
        JCheckBox checkBox1 = new JCheckBox("checkBox01");
        JCheckBox checkBox2 = new JCheckBox("checkBox02");

        container.add(checkBox1,BorderLayout.NORTH);
        container.add(checkBox2,BorderLayout.SOUTH);

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

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

---

3.6、列表

• 下拉框

public class TestComboboxDemo01 extends JFrame {
    public TestComboboxDemo01() {
        Container container = this.getContentPane();

        JComboBox status = new JComboBox();
        status.addItem(null);
        status.addItem("正在上映");
        status.addItem("已下架");
        status.addItem("即将上映");

        container.add(status);

        this.setSize(500,350);
        this.setVisible(true);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {
        new TestComboboxDemo01();
    }
}

• 列表框

public class TestComboboxDemo02 extends JFrame {
    public TestComboboxDemo02() {
        Container container = this.getContentPane();

        //生成列表内容
       // String[] contents = {"1","2","3"};

        Vector contents = new Vector();
        //列表中需要放内容
        JList jList = new JList(contents);

        contents.add("张三");
        contents.add("李四");
        contents.add("王五");

        container.add(jList);

        this.setSize(500,350);
        this.setVisible(true);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {
        new TestComboboxDemo02();
    }
}

---

3.7、文本框

• 文本框

public class TestTextDemo01 extends JFrame {
    public TestTextDemo01() {
        Container container = this.getContentPane();


        JTextField textField = new JTextField("Hello");
        JTextField textField2 = new JTextField("world");

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

        this.setSize(500,350);
        this.setVisible(true);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

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

• 密码框

public class TestTextDemo02 extends JFrame {
    public TestTextDemo02() {
        Container container = this.getContentPane();

        JPasswordField passwordField = new JPasswordField();
        passwordField.setEchoChar('*');

        container.add(passwordField,BorderLayout.CENTER);

        this.setSize(500,350);
        this.setVisible(true);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

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

• 文本域

new JTextArea();