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/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		// your code goes here
	}
 
	public  static byte[][] arrayCopy(byte[][] arr){
    	if(arr!=null){
        	int[][] arrCopy = new int[arr.length][] ;
    	    System.arraycopy(arr, 0, arrCopy, 0, arr.length);
	        return arrCopy;
    	}else { return new int[][]{};}
	}
 
 
}

Main.java:19: error: incompatible types
	        return arrCopy;
	               ^
  required: byte[][]
  found:    int[][]
Main.java:20: error: incompatible types
    	}else { return new int[][]{};}
    	               ^
  required: byte[][]
  found:    int[][]
2 errors

Standard output is empty