public class Array {

public static void main(String[] args) {

    int [][] arr= { {4,5,6,7},{1,2,3,8}};
    int x;

    for(int a= 0,b= 0;a<= 3 && b<= 3; a++, b++){
        try {
            x = arr[a][b];
            System.out.println("a = "+ a + " b = "+ b +"n"+ x +"nCorrect----------------------");
        }catch(ArrayIndexOutOfBoundsException e) {
            System.out.println("a = "+ a + " b = "+ b +"nERROR------------------");
        }
    }


}

a = 0 b = 0
4
Correct----------------------
a = 1 b = 1
2
Correct----------------------
a = 2 b = 2
ERROR------------------
a = 3 b = 3
ERROR------------------