楼房太阳能取暖:Exception in thread "main"java . lang.NoClassDefFoundError:J01_Frame什么意思啊

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附上源代码
import javax.swing.*;
import java.awt.*;
class FrameTest
{
JFrame frameObj;
public FrameTest()
{
frameObj=new JFrame("窗体标题");
frameObj.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frameObj.setVisible(true);
frameObj.setSize(240,90);
}
}
public class J01_Frame
{
public static void main (String[] args)
{
new Frame();
}
}

这样子写试试,保存为FrameTest.java文件.
import javax.swing.*;
import java.awt.*;
class FrameTest
{
JFrame frameObj;
public FrameTest()
{
frameObj=new JFrame("窗体标题");
frameObj.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frameObj.setVisible(true);
frameObj.setSize(240,90);
}

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

J01_Frame是你的文件名字

Exception in thread "main" java.lang.NoXuchMethodError: main Exception in thread "main" java.lang.NoClassDefFoundError:Hello Exception in thread "main" java.lang.NoClassDefFoundError 为什么Exception in thread "main" java.lang.NoClassDefFoundError？？？ java出现错误Exception in thread "main"... Exception in thread "main" java.lang.NoClassDefFoundError Exception in thread "main" java.lang.NoSuchMethodError: main Exception in thread "main" java.lang.NoClassDefFoundError: HelloDate 悬赏20:Exception in thread "Thread-3" java.lang.ArrayIndexOutOfBoundsException: -718 java请问为什么会抛出这种异常Exception in thread "main" java.lang.NoClassDefFoundError