package mousemotion;

import java.awt.Container;
import java.awt.Insets;
import java.awt.event.MouseEvent;
import java.awt.event.MouseMotionListener;

import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JButton;

public class MotionTest extends JFrame implements MouseMotionListener{

JButton button = new JButton("ok");

public MotionTest()
{
init();
}

public void init()
{
Container con = this.getContentPane();
con.setLayout(null);
button.setBounds(100,100,50,30);
button.setMargin(new Insets(1,1,1,1));
con.add(button);

button.addMouseMotionListener(this);

this.setTitle("鼠标拖动事件");
this.setSize(500,500);
this.setVisible(true);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}

public void mouseDragged(MouseEvent e){

button.setLocation(e.getX(),e.getY());
}

/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
new MotionTest();

}

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

}
}
在方法体中还需要写些什么?

拖动按钮时总是不对

帮帮忙

你想达到什么效果！！

鼠标拖动事件就是mouseDragged

我也说不清楚.你们运行一下就知道了

拖动时按钮的移动不对劲

确实，不知道该怎么改！！

[CODE]import java.awt.Container;
import java.awt.Insets;
import java.awt.event.MouseEvent;
import java.awt.event.MouseMotionListener;
import javax.swing.JFrame;
import javax.swing.JButton;
import javax.swing.SwingUtilities;
public class MotionTest extends JFrame implements MouseMotionListener{

JButton button = new JButton("ok");

public MotionTest()
{
init();
}

public void init()
{
Container con = this.getContentPane();
con.setLayout(null);
button.setBounds(100,100,50,30);
button.setMargin(new Insets(1,1,1,1));
con.add(button);

this.addMouseMotionListener(this);//

this.setTitle("鼠标拖动事件");
this.setSize(500,500);
this.setVisible(true);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}

public void mouseDragged(MouseEvent e){
button.setLocation(e.getX(),e.getY());
SwingUtilities.updateComponentTreeUI(this);//加这个,强制更新组件树
}
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
new MotionTest();
}
public void mouseMoved(MouseEvent e) {
// TODO Auto-generated method stub

}
}[/CODE]

加了这句还是不行啊
移动起来还是不对……

SwingUtilities.updateComponentTreeUI(this);//加这个,强制更新组件树

你想怎么移动?
[CODE]import java.awt.Container;
import java.awt.Insets;
import java.awt.Point;
import java.awt.event.MouseEvent;
import java.awt.event.MouseMotionListener;
import javax.swing.JFrame;
import javax.swing.JButton;
import javax.swing.SwingUtilities;
public class MotionTest extends JFrame implements MouseMotionListener{

JButton button = new JButton("ok");

public MotionTest()
{
init();
}

public void init()
{
Container con = this.getContentPane();
con.setLayout(null);
button.setBounds(100,100,50,30);
button.setMargin(new Insets(1,1,1,1));
con.add(button);

button.addMouseMotionListener(this);

this.setTitle("鼠标拖动事件");
this.setSize(500,500);
this.setVisible(true);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}

public void mouseDragged(MouseEvent e){
Point p=button.getLocation();
button.setLocation(p.x+e.getX(),p.y+e.getY());
SwingUtilities.updateComponentTreeUI(this);
}
/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
new MotionTest();
}
public void mouseMoved(MouseEvent e) {
// TODO Auto-generated method stub

}
}[/CODE]

试试这个,自动以左上角定位

我知道我哪儿错了

谢谢