使用javaGUI编写检测是否有网

比眉伴天荒 2021-09-22 00:40 276阅读 0赞

## 说明： ##

*  启动后会置顶出现一弹窗
 *  弹窗为黑色
    
     *  一直为黑色表明没有网络
     *  黑红交替为有网络
 *  鼠标点击可以移动图标
 *  三击结束任务

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### 生成的jar包 ###

[使用javaGUI编写检测是否有网 simplejava.jar][javaGUI_ simplejava.jar]

### 生成的exe文件 ###

[使用javaGUI编写检测是否有网 网络检测.exe][javaGUI_ _.exe]

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## 代码如下 ##

import java.awt.Color;
    import java.awt.Cursor;
    import java.awt.Point;
    import java.awt.event.MouseEvent;
    import java.io.BufferedReader;
    import java.io.IOException;
    import java.io.InputStreamReader;
    
    import javax.swing.JLabel;
    import javax.swing.JWindow;
    import javax.swing.event.MouseInputListener;
    
    /** * 检测是否存在网络 * * @author Jeby Sun */
    public class MyFrame extends JWindow { 
    
        private static final long serialVersionUID = 1L;
    
        JLabel titleLbl;
    
        public MyFrame() throws IOException { 
            int waH = 50;
            //设置背景颜色不能直接调用其setBackground方法，而要设置其ContentPane的背景颜色。
            this.getContentPane().setBackground(Color.black);
            this.setBounds(10, 10, waH, waH);
            this.setLayout(null);
    
            titleLbl = new JLabel();
            titleLbl.setOpaque(true);
            titleLbl.setBackground(Color.BLACK);
            titleLbl.setBounds(0, 0, waH, waH);
            this.add(titleLbl);
            //鼠标事件处理类
            MouseEventListener mouseListener = new MouseEventListener(this);
            titleLbl.addMouseListener(mouseListener);
            titleLbl.addMouseMotionListener(mouseListener);
            this.setAlwaysOnTop(true);
            this.setVisible(true);
            Boolean flag = true;
            while (true){ 
                Process process = Runtime.getRuntime().exec("ping www.baidu.com");
                BufferedReader bufferedReader = new BufferedReader(
                        new InputStreamReader(process.getInputStream(), "GBK"));
                String line = null;
                while((line=bufferedReader.readLine()) != null) { 
                    if (line!=null&&line.contains("的回复")){ 
                        flag = !flag;
                        if (flag){ 
                            titleLbl.setBackground(Color.RED);
                        }else { 
                            titleLbl.setBackground(Color.BLACK);
                        }
                    }
                }
                flag = true;
                titleLbl.setBackground(Color.BLACK);
            }
        }
    
        /** * 鼠标事件处理 * * @author Jeby Sun */
        class MouseEventListener implements MouseInputListener { 
    
            Point origin;
            //鼠标拖拽想要移动的目标组件
            MyFrame frame;
    
            public MouseEventListener(MyFrame frame) { 
                this.frame = frame;
                origin = new Point();
            }
    
            @Override
            public void mouseClicked(MouseEvent e) { 
                int clickTimes = e.getClickCount();
                if (clickTimes == 3) { 
                    System.exit(0);
                }
            }
    
            /** * 记录鼠标按下时的点 */
            @Override
            public void mousePressed(MouseEvent e) { 
                origin.x = e.getX();
                origin.y = e.getY();
            }
    
            @Override
            public void mouseReleased(MouseEvent e) { 
            }
    
            /** * 鼠标移进标题栏时，设置鼠标图标为移动图标 */
            @Override
            public void mouseEntered(MouseEvent e) { 
                this.frame.setCursor(Cursor.getPredefinedCursor(Cursor.MOVE_CURSOR));
            }
    
            /** * 鼠标移出标题栏时，设置鼠标图标为默认指针 */
            @Override
            public void mouseExited(MouseEvent e) { 
                this.frame.setCursor(Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR));
            }
    
            /** * 鼠标在标题栏拖拽时，设置窗口的坐标位置 * 窗口新的坐标位置 = 移动前坐标位置+（鼠标指针当前坐标-鼠标按下时指针的位置） */
            @Override
            public void mouseDragged(MouseEvent e) { 
                Point p = this.frame.getLocation();
                this.frame.setLocation(
                        p.x + (e.getX() - origin.x),
                        p.y + (e.getY() - origin.y));
            }
    
            @Override
            public void mouseMoved(MouseEvent e) { 
            }
    
        }
    
    
        public static void main(String[] args) throws IOException { 
            new MyFrame();
        }
    
    }

[javaGUI_ simplejava.jar]: https://download.csdn.net/download/L_fly_J/19686203
[javaGUI_ _.exe]: https://download.csdn.net/download/L_fly_J/19686196