AWT-布局管理器

布局管理器

流式布局

package com.deng.lesson01;

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

public class TextFlowLayout {
    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");

        //设置流式布局
        //frame.setLayout(new FlowLayout());居中
        //frame.setLayout(new FlowLayout(FlowLayout.LEFT));  向左
        frame.setLayout(new FlowLayout(FlowLayout.RIGHT));  //向右

        frame.setVisible(true);
        frame.setSize(600,690);

        //把按钮添加上去
        frame.add(button1);
        frame.add(button2);
        frame.add(button3);

        //结束程序
        frame.addWindowListener(new WindowAdapter() {
            @Override
            public void windowClosing(WindowEvent e) {
                super.windowClosing(e);
                System.exit(0);
            }
        });
    }
}

东南西北中

package com.deng.lesson01;

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

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


        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);

        //设置可见性，坐标
        frame.setVisible(true);
        frame.setSize(700,800);

        //结束程序
        frame.addWindowListener(new WindowAdapter() {
            @Override
            public void windowClosing(WindowEvent e) {
                super.windowClosing(e);
                System.exit(0);
            }
        });
    }
}

表格布局

package com.deng.lesson01;

import java.awt.*;

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


        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));

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

        frame.pack();//java函数！自动布局
        frame.setVisible(true);

    }
}

课堂练习

package com.deng.lesson01;

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

//练习的demo讲解
public class EXDemo {
    public static void main(String[] args) {
        //总frame
        Frame frame = new Frame();
        frame.setVisible(true);
        frame.setSize(400,300);
        frame.setLocation(300,400);
        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("East-1"),BorderLayout.EAST);
        p1.add(new Button("West-1"),BorderLayout.WEST);
        p2.add(new Button("p2-btn-1"));
        p2.add(new Button("p2-btn-2"));
        p1.add(p2,BorderLayout.CENTER);

        //下面
        p3.add(new Button("East-2"),BorderLayout.EAST);
        p3.add(new Button("West-2"),BorderLayout.WEST);
        //中间4个
        for (int i = 0; i < 4; i++) {
            p4.add(new Button("for-"+i));
        }
        p3.add(p4,BorderLayout.CENTER);

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

    //结束进程
    frame.addWindowListener(new WindowAdapter() {
        @Override
        public void windowClosing(WindowEvent e) {
            super.windowClosing(e);
            System.exit(0);
        }
    });
    }
}

总结

1. Frame是一个顶级窗口

2. Panel无法单独显示，必须添加到某个容器中

3. 布局管理器

​ 流式 东南西北中 表格

4. 属性：大小 定位 背景颜色 可见性 监听