怎样修改现成的代码，使其在Netbeans中可以运行？

donald1987 2008-11-15 03:20:18

小弟是java初学者，想请教众位大侠一个问题，谢谢！
在网上找到如下的java源代码，目的是实现拖拽图片的效果，不知道怎么让它运行，请指点迷津！
是应该准备什么条件呢？或者修改哪里？劳烦详细说明！非常感谢！

源代码：

/*
* DragPictureDemo.java
*
* Created on 2008年11月14日, 下午6:46
*/

package myproject;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
/**
*
* @author 60008
*/
public class DragPictureDemo extends javax.swing.JFrame {

JLabel jlPic; //图片，用于拖动
/** Creates new form DragPictureDemo */
public DragPictureDemo() {

super("图片的拖动效果"); //调用父类构造函数
Icon image=new ImageIcon(this.getClass().getResource("E:/FYP/img/1.jpg")); //实例化图标
jlPic = new JLabel(image); //实例化带图片的标签
getContentPane().add(jlPic); //增加标签到容器上

DragPicListener listener=new DragPicListener(); //鼠标事件处理
jlPic.addMouseListener(listener); //增加标签的事件处理
jlPic.addMouseMotionListener(listener);

setSize(300,200); //设置窗口尺寸
setVisible(true); //设置窗口为可视
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); //关闭窗口时退出程序
}

class DragPicListener implements MouseInputListener{ //鼠标事件处理
Point p=new Point(0,0); //坐标点
public void mouseMoved(MouseEvent e){}
public void mouseDragged(MouseEvent e){
Point newP=SwingUtilities.convertPoint(jlPic,e.getPoint(),jlPic.getParent()); //转换坐标系统
jlPic.setLocation(jlPic.getX()+(newP.x-p.x),jlPic.getY()+(newP.y-p.y)); //设置标签的新位置
p=newP; //更改坐标点
}
public void mouseReleased(MouseEvent e){}
public void mouseEntered(MouseEvent e){}
public void mouseExited(MouseEvent e){}
public void mouseClicked(MouseEvent e){}
public void mousePressed(MouseEvent e){
p=SwingUtilities.convertPoint(jlPic,e.getPoint(),jlPic.getParent()); //得到当前坐标点
initComponents();

}
}
/** This method is called from within the constructor to
* initialize the form.
* WARNING: Do NOT modify this code. The content of this method is
* always regenerated by the Form Editor.
*/
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">//GEN-BEGIN:initComponents
private void initComponents() {

setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 400, Short.MAX_VALUE)
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 300, Short.MAX_VALUE)
);

pack();
}// </editor-fold>//GEN-END:initComponents

/**
* @param args the command line arguments
*/
public static void main(String[] args) {
new DragPictureDemo();
}
/*public static void main(String args[]) {
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new DragPictureDemo().setVisible(true);
}
});
}
*/

// Variables declaration - do not modify//GEN-BEGIN:variables
// End of variables declaration//GEN-END:variables
}

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