小编the*_*and的帖子

class ArrayApp{

    public static void main(final String[] args){

     long [] arr; 
     arr= new long[100];
     int i;
     arr[0]=112;
     arr[1]=111;
     for(i=0;i<arr;i++) {
     System.out.println(arr[i]);
     }

  } 
} 

我收到这个错误,

ArrayApp.java:10: operator < cannot be applied to int,long[]
        for(i=0;i<arr;i++) {
                 ^

import java.io.*;

public class ArrayApp{

    public static void main(String[] args){

        System.out.println("lllll");
    } // end main()
} // end class ArrayApp

我编译后运行我的应用程序时出现此错误.

Exception in thread "main" java.lang.NoClassDefFoundError: ArrayApp
Caused by: java.lang.ClassNotFoundException: ArrayApp
        at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
Could not find the main class: ArrayApp.  Program will exit.