## Monday, 29 August 2016

### Chapter 8 Exercise 29, Introduction to Java Programming, Tenth Edition Y. Daniel LiangY.

29.(Identical arrays) The two-dimensional arrays m1 and m2 are identical if they
have the same contents. Write a method that returns true if m1 and m2 are iden-
public static boolean equals(int[][] m1, int[][] m2)
Write a test program that prompts the user to enter two 3 * 3 arrays of integers
and displays whether the two are identical. Here are the sample runs.
Enter list1: 51 25 22 6 1 4 24 54 6
Enter list2: 51 22 25 6 1 4 24 54 6
The two arrays are identical
Enter list1: 51 5 22 6 1 4 24 54 6
Enter list2: 51 22 25 6 1 4 24 54 6
The two arrays are not identical

package Chapter_08;

import java.util.Scanner;

public class Exercise_29 {

public static void main(String[] args) {

int[][] m1 = new int[3][3];
int[][] m2 = new int[3][3];

Scanner input = new Scanner(System.in);
System.out.print("Enter list1: ");
for (int i = 0; i < m1.length; i++)
for (int j = 0; j < m1[i].length; j++)
m1[i][j] = input.nextInt();
System.out.print("Enter list2: ");
for (int i = 0; i < m2.length; i++)
for (int j = 0; j < m2[i].length; j++)
m2[i][j] = input.nextInt();

if (equals(m1, m2)) {
System.out.println("The two arrays are strictly identical.");
} else {
System.out.println("The two arrays are not strictly identical");
}
}

public static boolean equals(int[][] m1, int[][] m2) {

if (m1.length != m2.length || m1[0].length != m2[0].length) return false;

for (int i = 0; i < m1.length; i++) {
for (int j = 0; j < m1[i].length; j++) {

if (m1[i][j] != m2[i][j]) return false;
}
}

return true;
}
}