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

//definition of JPanel
class mypanel5 extends JPanel
implememts MouseMotionListener
{
public mypanel5()
{
addMouseListener(new MouseAdapter()
{ public void mouseClicked(MouseEvent evt)
{
int i=evt.getClickCount();
if(i==1)
System.out.println("the clicknumber is one.");
if(i==2)
System.out.println("the clicknumber is two.");
int x=evt.getX();
int y=evt.getY();
System.out.println("the position is ("+x+","+y+").");
}

public void mousePressed(MouseEvent evt)
{
System.out.println("the mouse has pressed.");
}
public void mouseReleased(MouseEvent evt)
{
System.out.println("the mouse has released.");
}

});
add MouseMotionListener(this);
}

// to implement the mousemotionlistener

public void mouseDragged(MouseEvent evt)
{
System.out.println("the mouse is dragging.");
}

public void mouseMoved(MouseEvent evt)
{

System.out.println("the mouse is moving .");
}

public void paint(Graphics g)
{
setBackground(Color.yellow);
}
}

上面这个程序同步过编译,说是第六行和第十五行缺少括号,请大家看看啊

是implements 还是 implememts???
lz 要认真点哦!

add MouseMotionListener(this);

add 后面怎么有" " 空格??

你是在那里做程序的？犯这样的错误。
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

//definition of JPanel
class mypanel5 extends JPanel
implememts MouseMotionListener //implements
{
public mypanel5()
{
addMouseListener(new MouseAdapter()
{ public void mouseClicked(MouseEvent evt)
{
int i=evt.getClickCount();
if(i==1)
System.out.println("the clicknumber is one.");
if(i==2)
System.out.println("the clicknumber is two.");
int x=evt.getX();
int y=evt.getY();
System.out.println("the position is ("+x+","+y+").");
}

public void mousePressed(MouseEvent evt)
{
System.out.println("the mouse has pressed.");
}
public void mouseReleased(MouseEvent evt)
{
System.out.println("the mouse has released.");
}

});
add MouseMotionListener(this); //中间怎么有空格？
}

// to implement the mousemotionlistener

public void mouseDragged(MouseEvent evt)
{
System.out.println("the mouse is dragging.");
}

public void mouseMoved(MouseEvent evt)
{

System.out.println("the mouse is moving .");
}

public void paint(Graphics g)
{
setBackground(Color.yellow);
}
}

犯这种错误太不应该啦，希望以后注意点

谢谢,谢谢,我是看了一下午都没有看出来,太谢谢大家了,我做事比较粗心,唉,改不了了,我还是学生,呵呵,还没人敢请我做程序呢.恐怕要找不到工作了,呵呵

我还想问一个问题,为什么我编译的时候会出现两个.class中间代码的文件呢,myframe5$1.class和myframe5.class,我只是把好几个类放在了一起,怎么会出现一个类编译了两次呢?

怎麽你的class的名字和你上面代碼里的不同啊？還有  你用的什麽編譯器啊  那些錯誤應該編譯器就能找齣來的啊

就是标准的,从sun网站上吓的j2sdk工具包,但是程序能运行出来,也没有错误