taijitu.java

它是用JAVA语言编写的一个小程序

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.awt.Rectangle;
import java.util.*;

public class paopao extends JFrame {
    int width = 400;
    int height = 300;
    public taijitu() {
        setSize(width, height);
        setTitle("改变泡泡大小");
        Toolkit toolkit = Toolkit.getDefaultToolkit();
        Dimension screen = toolkit.getScreenSize();
        int x = (screen.width - width) / 2;
        int y = (screen.height - height) / 2;
        setLocation(x, y);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {
        taijitu frame = new taijitu();
        DrawPanel draw = new DrawPanel();
        Container c = frame.getContentPane();
        JPanel button = new JPanel();
        JButton jb1 = new JButton("变大泡泡");
        JButton jb2 = new JButton("减小泡泡");
        jb1.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                // System.out.print("nihap");
                DrawPanel.x += 5;
                //定义为静态数据 用类名来直接访问
            }
        });
        jb2.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                // System.out.print("nihap");
                DrawPanel.x -= 5;
                //定义为静态数据 用类名来直接访问
            }
        });

        button.add(jb1);
        button.add(jb2);
        button.setBackground(Color.BLUE);
        c.add(button, BorderLayout.SOUTH);
        c.add(draw, BorderLayout.CENTER);
        frame.setVisible(true);
    }
}


class DrawPanel extends JPanel {
    public DrawPanel() {
        setBackground(Color.cyan);
    }

    public void paintComponent(Graphics g) {
        repaint();
        super.paintComponent(g);
        g.drawString("第一个泡泡的当前大小是：" + x, 20, 20);
        g.setColor(Color.BLACK);
        g.fillArc(m, n, x, x, 0, 180);
        g.setColor(Color.WHITE);
        g.fillArc(m, n, x, x, 180, 180);
        g.setColor(Color.BLACK);
        g.fillArc(m + x / 2, n + x / 4, x / 2, x / 2, 180, 180);
        g.setColor(Color.WHITE);
        g.fillArc(m, n + 3 + x / 4, x / 2, x / 2, 0, 180);
        g.fillOval(m + x * 3 / 4 - 5, n + x / 2 - 5, 10, 10);
        g.setColor(Color.BLACK);
        g.fillOval(m + x / 4 - 5, n + x / 2 - 5, 10, 10);
        
        
        
        g.drawString("第二个泡泡的当前大小是：" + x, 30, 40);
        g.setColor(Color.BLACK);
        g.fillArc(p, n, x, x, 0, 180);
        g.setColor(Color.WHITE);
        g.fillArc(p, n, x, x, 180, 180);
        g.setColor(Color.BLACK);
        g.fillArc(p + x / 2, n + x / 4, x / 2, x / 2, 180, 180);
        g.setColor(Color.WHITE);
        g.fillArc(p, n + 3 + x / 4, x / 2, x / 2, 0, 180);
        g.fillOval(p + x * 3 / 4 - 5, n + x / 2 - 5, 10, 10);
        g.setColor(Color.BLACK);
        g.fillOval(p + x / 4 - 5, n + x / 2 - 5, 10, 10);

    }

    Random r = new Random();
    int i = r.nextInt(50) + 1;
    int m = 20, n = 60,p=200;
    static int x = 100;
    

}