Question

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]);
     }

  } 
} 

I get this error,

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

Answer 1

You need to use the size of the array, which would be arr.length.

for (int i = 0; i < arr.length; ++i)

As of Java 1.5, you can also use the for each loop if you just need access to the array data.

for ( long l : arr )
{
    System.out.println(l);
}