有名大站

可以拖拉之後顯示滑鼠位置

可以讓人理解 電腦中X軸右+左- Y軸下+上- (我沒搞錯跟數學的不一樣)

package dragged;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;

public class TestMouseDragged{
int x,y ;
  int x0,y0 ;
  JButton btn=new JButton("可拖拉許功蓋");
  public TestMouseDragged(){
 
   
    JFrame f = new JFrame("許功蓋");
    f.setLayout(new FlowLayout(FlowLayout.CENTER));
   
    btn.addMouseListener(new MouseAdapter(){
   
      public void mouseClicked(MouseEvent me){
        x0 = me.getX();
        y0 = me.getY();
        System.out.println("mouse click-x0="+x0+"y0="+y0);
      }
      });  
      btn.addMouseMotionListener(new MouseAdapter(){
        public void mouseDragged(MouseEvent me){
          int x = btn.getX()+me.getX() - x0;
          int y = btn.getY()+me.getY() - y0;
          btn.setLocation(x,y);
          System.out.println("mouse X位置="+x+"Y位置"+y);   
        }
      });
      f.add(btn);
      f.pack();
      f.setSize(600,600);
      f.setVisible(true);
     
   

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