第16周周五 随机数的使用

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项目一：原代码

import java.awt.EventQueue;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.border.EmptyBorder;
import javax.swing.JButton;
import javax.swing.JTextField;
import javax.swing.JLabel;
import java.awt.Color;
import java.awt.SystemColor;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
public class Guess01 extends JFrame {
    /**
     * 
     */
    private static final long serialVersionUID = 1L;
    
    private JPanel contentPane;
    private JTextField tfDir;
    private JTextField tfClass;
    /**
     * Launch the application.
     */
    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                try {
                    Guess01 frame = new Guess01();
                    frame.setVisible(true);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });
    }
    /**
     * Create the frame.
     */
    public Guess01() {
        setTitle("\u731C\u731C\u770B\u6E38\u620FV0.1");
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setBounds(100, 100, 645, 409);
        contentPane = new JPanel();
        contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
        setContentPane(contentPane);
        contentPane.setLayout(null);
        
        // 选择目录 按钮的处理程序
        JButton btnDir = new JButton("\u9009\u62E9\u76EE\u5F55");
        btnDir.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent arg0) {
                
            }
        });
        btnDir.setBounds(26, 26, 93, 23);
        contentPane.add(btnDir);
        
        // 文本框，显示目录
        tfDir = new JTextField();
        tfDir.setEditable(false);
        tfDir.setBounds(125, 27, 363, 21);
        contentPane.add(tfDir);
        tfDir.setColumns(10);
        
        // 选择班级 按钮的处理程序
        JButton btnClass = new JButton("\u9009\u62E9\u73ED\u7EA7");
        btnClass.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                
            }
        });
        btnClass.setBounds(26, 59, 93, 23);
        contentPane.add(btnClass);
        
        // 文本框，显示班级文件
        tfClass = new JTextField();
        tfClass.setEditable(false);
        tfClass.setBounds(125, 60, 363, 21);
        contentPane.add(tfClass);
        tfClass.setColumns(10);
        
        // 标签，显示带猜测学生姓名
        JLabel lbGuessName = new JLabel("\u59D3\u540D");
        lbGuessName.setBounds(259, 91, 102, 23);
        contentPane.add(lbGuessName);
        
        // 标签，显示第一个学生相片
        JLabel lblImg1 = new JLabel("\u56FE\u72471");
        lblImg1.addMouseListener(new MouseAdapter() {
            @Override
            public void mouseClicked(MouseEvent arg0) {
                
            }
        });
        lblImg1.setBounds(26, 151, 183, 178);
        contentPane.add(lblImg1);
        
        // 标签，显示第二个学生相片
        JLabel lblImg2 = new JLabel("\u56FE\u72472");
        lblImg2.addMouseListener(new MouseAdapter() {
            @Override
            public void mouseClicked(MouseEvent e) {
                
            }
        });
        lblImg2.setForeground(Color.BLACK);
        lblImg2.setBackground(SystemColor.inactiveCaption);
        lblImg2.setBounds(241, 155, 183, 172);
        contentPane.add(lblImg2);
        
        // 标签，显示第三个学生相片
        JLabel lblImg3 = new JLabel("\u56FE\u72473");
        lblImg3.addMouseListener(new MouseAdapter() {
            @Override
            public void mouseClicked(MouseEvent e) {
                
            }
        });
        lblImg3.setBounds(434, 155, 185, 172);
        contentPane.add(lblImg3);
        
        // 再猜一次 按钮，点击则更新相应的三张图片 与 带猜测学生姓名
        JButton btnGuessAgain = new JButton("\u518D\u731C\u4E00\u6B21");
        btnGuessAgain.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                
            }
        });
        btnGuessAgain.setBounds(223, 337, 93, 23);
        contentPane.add(btnGuessAgain);
    }
}

第16周周五 随机数的使用

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原文地址：http://blog.csdn.net/u013921527/article/details/46692081