Java:1.Frame窗体；2.Panel容器；3.FlowLayout布局；4.BorderLayout布局；5.Panel容器的嵌套使用。

1.Frame窗体

（1）单个页面的创建

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

public class FrameDemo1 {
    
    
    public static void main(String[] args) {
    
    
        //图形界面
        Frame frame = new Frame("图形界面");

        //设置界面可见性
        frame.setVisible(true);

        //设置窗口大小
        frame.setSize(500, 500);

        //设置背景颜色
        frame.setBackground(Color.MAGENTA);

        //设置界面位置
        frame.setLocation(200, 200);

        //设置不可缩放
        frame.setResizable(false);

        //设置界面可以关闭
        frame.addWindowListener(new WindowAdapter() {
    
    
            @Override
            public void windowClosing(WindowEvent e) {
    
    
                System.exit(0);
            }
        });
    }

}

（2）多个页面的创建

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

//多个界面的创建
public class FrameDemo2 {
    
    
    public static void main(String[] args) {
    
    
        new MyFrame(100, 100, 200, 200, Color.red);
        new MyFrame(300, 100, 200, 200, Color.green);
        new MyFrame(100, 300, 200, 200, Color.blue);
        new MyFrame(300, 300, 200, 200, Color.MAGENTA);
    }
}

class MyFrame extends Frame {
    
    
    static int counter = 1;

    public MyFrame(int x, int y, int a, int b, Color color) {
    
    
        super("界面" + (counter++));
        setVisible(true);
        setBounds(x, y, a, b);
        setBackground(color);
        //设置界面可以关闭
        addWindowListener(new WindowAdapter() {
    
    
            @Override
            public void windowClosing(WindowEvent e) {
    
    
                System.exit(0);
            }
        });
    }
}

2.Panel容器

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

public class PanelDemo {
    
    
    public static void main(String[] args) {
    
    
        //创建窗体
        Frame frame = new Frame("图形界面");

        //创建面板
        Panel panel = new Panel();

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

        //Frame设置坐标
        frame.setBounds(300, 300, 500, 500);
        frame.setBackground(Color.red);

        //Panel设置坐标，Frame的相对位置
        panel.setBounds(50, 50, 400, 400);
        panel.setBackground(Color.green);

        frame.add(panel);

        frame.setVisible(true);

        //适配器模式设置窗口关闭
        frame.addWindowListener(new WindowAdapter() {
    
    
            @Override
            public void windowClosing(WindowEvent e) {
    
    
                System.exit(0);
            }
        });

    }
}

3.FlowLayout布局

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

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

        Button button1 = new Button("button1");
        Button button2 = new Button("button2");
        Button button3 = new Button("button3");

        frame.setLayout(new FlowLayout(FlowLayout.LEFT));
        frame.setSize(300, 300);
        frame.setVisible(true);

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

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

运行结果为：

4.BorderLayout布局

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

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

        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.setSize(300, 300);
        frame.setVisible(true);
        frame.addWindowListener(new WindowAdapter() {
    
    
            @Override
            public void windowClosing(WindowEvent e) {
    
    
                System.exit(0);
            }
        });

        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);

    }
}

运行结果为：

5.Panel容器的嵌套使用

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

public class FrameTestDemo {
    
    
    public static void main(String[] args) {
    
    
        Frame frame = new Frame();
        frame.setSize(300, 300);
        frame.setLocation(400,400);
        frame.setVisible(true);
        frame.setLayout(new GridLayout(2, 1));
        frame.addWindowListener(new WindowAdapter() {
    
    
            @Override
            public void windowClosing(WindowEvent e) {
    
    
                System.exit(0);
            }
        });

        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));

        panel1.add(new Button("1"), BorderLayout.WEST);
        panel1.add(new Button("4"), BorderLayout.EAST);

        panel2.add(new Button("2"));
        panel2.add(new Button("3"));

        panel1.add(panel2, BorderLayout.CENTER);

        panel3.add(new Button("5"), BorderLayout.WEST);
        panel3.add(new Button("0"), BorderLayout.EAST);

        for (int i = 6; i < 10; i++) {
    
    
            panel4.add(new Button("" + i));
        }

        panel3.add(panel4, BorderLayout.CENTER);

        frame.add(panel1);
        frame.add(panel3);
    }
}

运行结果为：