766. Toeplitz Matrix

class Solution {
    public boolean isToeplitzMatrix(int[][] matrix) {
   
    for ( int i = 1 ; i < matrix.length ; i++ ){
    	for ( int j = 1; j < matrix[i].length ; j++ ){
    		if ( matrix [i-1][j-1] != matrix[i][j]) return false;
    	}
    }
	
	return true;
    }
}