【GUI】练习

package com.hyr.lesson01;

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

public class ExDemo {
    public static void main(String[] args) {
        //总frame
        Frame frame = new Frame();
        frame.setSize(400, 300);
        frame.setLocation(300, 400);
        frame.setBackground(new Color(216, 245, 187));
        frame.setVisible(true);

        //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));

        //上面的ok
        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);

    }
}

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：流试、东南西北中、表格