70岁老人坐飞机证明:Exception in thread "main" java.lang.NoXuchMethodError:j3/java

来源：百度文库编辑：高考问答时间：2024/05/02 06:21:29

我编的：
import java.io.*;;
public class j3
{public static void main(String args[]) throws IOException
{int x;
System.out.print("请输入");
x=System.in.read();
System.out.println(x) ;

}}
然后再dos下，javac编译，就出现题目的问题！请问为什么啊？

环境变量里classpath你有没有加jdk目录下的lib，或者在classpath最后再加个点，说明当前路径

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