java源代码实例

java dos输入输出

Java code

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import java.util.*;
public class DaoXu {

    /**
     * @param args
     */
    public static void main(String[] args) {
        // TODO 自动生成方法存根
        System.out.println("请输入单个字符并回车: ");
        Scanner c = new Scanner(System.in);
        
        String[] ch = new String[5];
        
        for(int i=0; i<5; i++){
            ch[i] = c.next();
        }
        
        //Arrays.sort(ch);

        System.out.print("倒序输出: ");
        for (int j = ch.length-1; j >= 0; j--) {
            System.out.print(ch[j]+" ");
        }
    }
}

java获取ip地址

Java code

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import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.net.InetAddress;
import java.net.UnknownHostException;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTextField;

public class ip extends JFrame
  implements ActionListener
{
  private static final long serialVersionUID = 3339481369781127417L;
  JButton jb1;
  JButton jb2;
  JButton jb3;
  JPanel jp;
  JLabel jl;
  JLabel jl1;
  JTextField jt;

  public ip()
  {
    this.jp = new JPanel();
    this.jl = new JLabel();
    this.jl1 = new JLabel("您的域名：");
    this.jb1 = new JButton("提交");
    this.jb2 = new JButton("重置");
    this.jb3 = new JButton("退出");
    this.jt = new JTextField(20);
    this.jb1.addActionListener(this);
    this.jb2.addActionListener(this);
    this.jb3.addActionListener(this);
    this.jp.setLayout(new GridLayout(3, 2));
    this.jp.add(this.jl1);
    this.jp.add(this.jt);
    this.jp.add(this.jb1);
    this.jp.add(this.jl);
    this.jp.add(this.jb2);
    this.jp.add(this.jb3);

    setBounds(200, 200, 500, 240);
    add(this.jp);
    setVisible(true);
    setDefaultCloseOperation(3);
  }

  public static void main(String[] args)
  {
    new ip();
  }

  public void actionPerformed(ActionEvent e) {
    if (e.getSource() == this.jb1) {
      String url = this.jt.getText();
      InetAddress ip = null;
      try {
        ip = InetAddress.getByName(url);
      }
      catch (UnknownHostException e1) {
        e1.printStackTrace();
      }
      this.jl.setText(ip.toString());
    }
    else if (e.getSource() == this.jb2) {
      this.jl.setText("");
      this.jt.setText("");
    } else {
      System.exit(0);
    }
  }
}

java系统托盘的应用

Java code

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package com.msg;   
  
import java.applet.Applet;   
import java.applet.AudioClip;   
import java.awt.AWTException;   
import java.awt.Image;   
import java.awt.MenuItem;   
import java.awt.PopupMenu;   
import java.awt.SystemTray;   
import java.awt.TextArea;   
import java.awt.TrayIcon;   
import java.awt.event.ActionEvent;   
import java.awt.event.ActionListener;   
import java.awt.event.MouseAdapter;   
import java.awt.event.MouseEvent;   
import java.awt.event.WindowAdapter;   
import java.awt.event.WindowEvent;   
import java.net.MalformedURLException;   
import java.net.URL;   
import java.util.Date;   
  
import javax.swing.ImageIcon;   
import javax.swing.JFrame;   
import javax.swing.SwingUtilities;   
import javax.swing.UIManager;   
import javax.swing.UnsupportedLookAndFeelException;   
  
import org.jvnet.substance.skin.SubstanceBusinessBlueSteelLookAndFeel;   
  
  
/**  
 *   
 * 创建闪动的托盘图像  
 * @author Everest  
 *  
 */  
public class BickerTray extends JFrame implements Runnable {   
  
    private static final long serialVersionUID = -3115128552716619277L;   
  
    private SystemTray sysTray;// 当前操作系统的托盘对象   
    private TrayIcon trayIcon;// 当前对象的托盘   
  
    private ImageIcon icon = null;   
    private TextArea ta = null;   
       
    private static int count = 1; //记录消息闪动的次数   
    private boolean flag = false; //是否有新消息   
    private static int times = 1; //接收消息次数   
  
    public BickerTray() {   
        this.createTrayIcon();// 创建托盘对象   
        Image image = this.getToolkit().getImage(getRes("com/img/f32.gif"));   
        this.setIconImage(image);   
        init();   
    }   
  
    public URL getRes(String str){   
         return this.getClass().getClassLoader().getResource(str);   
    }   
       
    /**  
     * 初始化窗体的方法  
     */  
    public void init() {   
        this.setTitle("消息盒子");   
        ta = new TextArea("");   
        ta.setEditable(false);   
        this.add(ta);   
        this.setSize(400, 400);   
        //this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);   
        this.setLocationRelativeTo(null);   
        // 添加窗口最小化事件,将托盘添加到操作系统的托盘   
        /*this.addWindowListener(new WindowAdapter() {  
            public void windowIconified(WindowEvent e) {  
                addTrayIcon();  
            }  
        });*/  
        addTrayIcon();   
        this.setVisible(true);   
    }   
  
    /**  
     * 添加托盘的方法  
     */  
    public void addTrayIcon() {   
        try {   
            sysTray.add(trayIcon);// 将托盘添加到操作系统的托盘   
            setVisible(false);    // 使得当前的窗口隐藏   
            new Thread(this).start();   
        } catch (AWTException e1) {   
            e1.printStackTrace();   
        }   
    }   
  
    /**  
     * 创建系统托盘的对象 步骤:   
     * 1,获得当前操作系统的托盘对象   
     * 2,创建弹出菜单popupMenu   
     * 3,创建托盘图标icon  
     * 4,创建系统的托盘对象trayIcon  
     */  
    public void createTrayIcon() {   
        sysTray = SystemTray.getSystemTray();// 获得当前操作系统的托盘对象   
        icon = new ImageIcon(getRes("com/img/f17.gif"));// 托盘图标   
        PopupMenu popupMenu = new PopupMenu();// 弹出菜单   
        MenuItem mi = new MenuItem("打开");   
        MenuItem exit = new MenuItem("退出");   
        popupMenu.add(mi);   
        popupMenu.add(exit);   
        // 为弹出菜单项添加事件   
        mi.addActionListener(new ActionListener() {   
            public void actionPerformed(ActionEvent e) {   
                ta.setText(ta.getText()+"\n==============================================\n 《通知》 今天下午4:00到大礼堂开会。 \n 第"+times+"次接收时间："+ new Date().toLocaleString()); // 设置通知消息内容   
                BickerTray.this.setExtendedState(JFrame.NORMAL);   
                BickerTray.this.setVisible(true); // 显示窗口   
                BickerTray.this.toFront(); //显示窗口到最前端   
                flag = false;  //消息打开了   
                count = 0; times++;   
            }   
        });   
        exit.addActionListener(new ActionListener() {   
            public void actionPerformed(ActionEvent e) {   
                System.exit(0);   
            }   
        });   
        trayIcon = new TrayIcon(icon.getImage(), "消息盒子", popupMenu);   
        /** 添加鼠标监听器，当鼠标在托盘图标上双击时，默认显示窗口 */  
        trayIcon.addMouseListener(new MouseAdapter() {   
            public void mouseClicked(MouseEvent e) {   
                if (e.getClickCount() == 2) { // 鼠标双击   
                    ta.setText(ta.getText()+"\n==============================================\n 《通知》 今天下午4:00到大礼堂开会。 \n 第"+times+"次接收时间："+ new Date().toLocaleString()); // 设置通知消息内容   
                    BickerTray.this.setExtendedState(JFrame.NORMAL);   
                    BickerTray.this.setVisible(true); // 显示窗口   
                    BickerTray.this.toFront();   
                    flag = false;  //消息打开了   
                    count = 0; times++;   
                }   
            }   
        });   
    }   
  
    /**  
     * 线程控制闪动   
     */  
    public void run() {   
        while (true) {   
            if(flag){ // 有新消息   
                try {   
                    if(count == 1){   
                        // 播放消息提示音   
                        //AudioPlayer p = new AudioPlayer(getRes("file:com/sound/Msg.wav"));   
                        //p.play(); p.stop();   
                        try {   
                            AudioClip p = Applet.newAudioClip(new URL("file:sound/msg.wav"));   
                            p.play();   
                        } catch (MalformedURLException e) {   
                            e.printStackTrace();   
                        }   
                    }   
                    // 闪动消息的空白时间   
                    this.trayIcon.setImage(new ImageIcon("").getImage());   
                    Thread.sleep(500);   
                    // 闪动消息的提示图片   
                    this.trayIcon.setImage(icon.getImage());   
                    Thread.sleep(500);   
                } catch (Exception e) {   
                    e.printStackTrace();   
                }   
                count++;   
            }else{ // 无消息或是消息已经打开过   
                this.trayIcon.setImage(icon.getImage());   
                try {   
                    Thread.sleep(20000);   
                    flag = true;   
                } catch (InterruptedException e) {   
                    e.printStackTrace();   
                }   
            }   
        }   
    }   
  
    /**  
     * @param args  
     */  
    public static void main(String[] args) {   
        JFrame.setDefaultLookAndFeelDecorated(true);   
        try {   
            UIManager.setLookAndFeel(new SubstanceBusinessBlueSteelLookAndFeel());   
        } catch (UnsupportedLookAndFeelException e) {   
            e.printStackTrace();   
        }   
  
        SwingUtilities.invokeLater(new Runnable() {   
            public void run() {   
                new BickerTray();   
            }   
        });   
    }   
  
}  

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