Toeplitz Matrix in java

Toeplitz matrix where all the diagonals are equal.

	import java.util.*;
	public class ToeplizMatrix {
	public static int toeplizMatrix(int[][] input1)
	{
	int output=0,output1=0,output2=0,tally=0;
	int rows=input1.length;int columns=input1[0].length;
	//The below method checks the center diagonal to all diagonals at the right side of matrix.
	for(int a=0;a<columns;a++){
	tally=input1[0][a];
	for(int b=0,c=a;b<rows && c<columns;b++,c++){
	if(tally==input1[b][c]){
	output1=1;
	}
	else{
	output1=-1;
	break;
	}
	}
	if(output1==-1){ //This breaks the loop if diagonals are not matching
	break;
	}
	}
	//The below method checks the after the center diagonal to all diagonals at the left side of matrix.
	for(int i=1;i<rows;i++){
	tally=input1[i][0];
	for(int j=i,k=0;j<rows && k<columns;j++,k++){
	if(tally==input1[j][k]){
	output2=1;
	}
	else{
	output2=-1;
	break;
	}
	}
	if(output2==-1){ //This breaks the loop if diagonals are not matching
	break;
	}
	}
	if(output1+output2>0)
	output=1;
	else
	output=-1;
	return output;
	}
	public static void main(String [] args){
	Scanner in = new Scanner(System.in);
	int output = 0;
	int ip1_rows = 0;
	int ip1_cols = 0;
	ip1_rows = Integer.parseInt(in.nextLine().trim());
	ip1_cols = Integer.parseInt(in.nextLine().trim());
	int[][] ip1 = new int[ip1_rows][ip1_cols];
	for(int ip1_i=0; ip1_i<ip1_rows; ip1_i++) {
	for(int ip1_j=0; ip1_j<ip1_cols; ip1_j++) {
	ip1[ip1_i][ip1_j] = in.nextInt();
	}
	}
	output = toeplizMatrix(ip1);
	System.out.println(String.valueOf(output));
	in.close();
	}
	}

view raw ToeplitzMatrix hosted with ❤ by GitHub

Input:
4
5
6 7 8 9 2
4 6 7 8 9
1 4 6 7 8
0 1 4 6 7

Output:  1

Input:
3
3
1 2 3
4 5 6
7 8 9
 Output: -1