今天听了某某的话我的心马上就要碎了我想我是很坚强的在流泪的那一刹那我尽量压抑住自己的心情心要痛真的好痛只有失恋的人才能体会

------------------------窗体背景颜色换不停import java.awt.BorderLayout;import java.awt.Color;import java.awt.Container;import java.awt.event.ActionEvent;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JPanel;public class DemoFrame { JFrame frame = new JFrame("示例窗口"); JButton b1 = new JButton("点击我"); JPanel panel = new JPanel(); public DemoFrame() { Container contentPanel = frame.getContentPane(); panel.setBackground(Color.BLACK); contentPanel.add(panel, BorderLayout.CENTER); contentPanel.add(b1, BorderLayout.SOUTH); b1.addActionListener(new MyHandler(panel)); frame.setSize(400, 300); frame.show(); } public static void main(String[] args) { new DemoFrame(); } }class MyHandler implements java.awt.event.ActionListener{ private JPanel panel; public MyHandler(JPanel panel){ this.panel = panel; } public void actionPerformed(ActionEvent e) { System.out.println("Hello World!"); Color c = new Color(randomInt(), randomInt(), randomInt()); panel.setBackground(c); } public int randomInt(){ double d = Math.random(); int i = (int)(d * 1000); System.out.println("int =" + (i % 255)); return (i % 255); } }--------------------------------------------同上import java.awt.BorderLayout;import java.awt.Color;import java.awt.Container;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JPanel;public class DemoFrame01 { JFrame frame = new JFrame("示例窗口"); JButton b1 = new JButton("点击我"); JPanel panel = new JPanel(); public DemoFrame01() { Container contentPanel = frame.getContentPane(); panel.setBackground(Color.BLACK); contentPanel.add(panel, BorderLayout.CENTER); contentPanel.add(b1, BorderLayout.SOUTH); b1.addActionListener( new ActionListener(){ public void actionPerformed(ActionEvent e) { Color c = new Color(randomInt(), randomInt(), randomInt()); panel.setBackground(c); } public int randomInt(){ double d = Math.random(); int i = (int)(d * 1000); System.out.println("int =" + (i % 255)); return (i % 255); } } ); frame.setSize(400, 300); frame.show(); } public static void main(String[] args) { new DemoFrame(); } }------------------------------------将下面“”中的话替换成TXT里面的import java.io.BufferedWriter;import java.io.File;import java.io.FileWriter;import java.io.IOException;import java.io.PrintWriter;public class WriterDemo {public static void main(String[] args) {File f = new File("e:/nihai.txt");FileWriter fw;try {fw = new FileWriter(f);BufferedWriter bw = new BufferedWriter(fw);PrintWriter w = new PrintWriter(bw);w.println("second writer.....................");w.println("aaaaaaaaaaaaaaaaaaaaaaaaa");w.println(2342342.234);