GuiHelloWorld

package com.home.test;

import java.awt.Color; import java.awt.Cursor; import java.awt.Font; import java.awt.Point; import java.awt.event.MouseEvent;

import javax.swing.JLabel; import javax.swing.JWindow; import javax.swing.event.MouseInputListener;

public class GuiHelloWorld extends JWindow {  private static final long serialVersionUID = 1L;  JLabel titleLbl;  Font GuiHelloWorldFont;

public GuiHelloWorld() {   GuiHelloWorldFont = new Font("幼圆", Font.ITALIC, 28);      this.getContentPane().setBackground(new Color(0x99FF66));   this.setBounds(400, 200, 200, 60);   this.setLayout(null);      titleLbl = new JLabel(" Hello World!");   titleLbl.setFont(GuiHelloWorldFont);   titleLbl.setOpaque(true);   titleLbl.setBackground(new Color(0x66CC00));   titleLbl.setBounds(0, 0, 200, 60);   this.add(titleLbl);      // 鼠标事件处理类   MouseEventListener mouseListener = new MouseEventListener(this);   titleLbl.addMouseListener(mouseListener);   titleLbl.addMouseMotionListener(mouseListener);   this.setVisible(true);  }

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

class MouseEventListener implements MouseInputListener {  Point origin; // 鼠标拖拽想要移动的目标组件  GuiHelloWorld frame;

public MouseEventListener(GuiHelloWorld frame) {   this.frame = frame;   origin = new Point();  }

public void mouseClicked(MouseEvent e) {   // TODO Auto-generated method stub

}

public void mousePressed(MouseEvent e) {   // TODO Auto-generated method stub   origin.x = e.getX();   origin.y = e.getY();  }

public void mouseReleased(MouseEvent e) {   // TODO Auto-generated method stub

}

public void mouseEntered(MouseEvent e) {   // TODO Auto-generated method stub   this.frame.setCursor(Cursor.getPredefinedCursor(Cursor.MOVE_CURSOR));  }

public void mouseExited(MouseEvent e) {   // TODO Auto-generated method stub   this.frame.setCursor(Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR));  }

public void mouseDragged(MouseEvent e) {   // TODO Auto-generated method stub   Point p = this.frame.getLocation();   this.frame.setLocation(p.x + (e.getX() - origin.x), p.y     + (e.getY() - origin.y));  }

public void mouseMoved(MouseEvent e) {   // TODO Auto-generated method stub

}

}