Find the Reverse of a Two Dimensional Array in Java

The following program demonstrates how to Find the Reverse of a Two Dimensional Array in Java.

Basically, here we create a 2 X 2 array by taking four integers as command line arguments. If the user doesn’t provide exactly four integers, the program shows an error message and exits. Otherwise, it creates a 2D array y using these numbers. Further, a new 2 X 2 array is created and the nested for loop inserts the elements of the original array into the new array in reverse order.

public class Exercise13
{
	public static void main(String[] args) {
		if(args.length!=4)
		{
			System.out.println("Please enter 4 integer numbers");
			System.exit(0);
		}
		int[][] arr=new int[2][2];
		int[][] arr1=new int[2][2];
		int c=0;
		for(int i=0;i<2;i++)
		{
			for(int j=0;j<2;j++)
			{
				arr[i][j]=Integer.parseInt(args[c]);
				c++;
			}
		}

	        System.out.println("Original Array...");
		for(int i=0;i<2;i++)
		{
			for(int j=0;j<2;j++)
			{
				System.out.print(arr[i][j]+" ");
			}
			System.out.println();
		}
		for(int i=0;i<2;i++)
		{
			for(int j=0;j<2;j++)
			{
				arr1[i][j]=arr[1-i][1-j];
			}
			System.out.println();
		}
		
		arr=arr1;
	        System.out.println("Reversed Array...");
		for(int i=0;i<2;i++)
		{
			for(int j=0;j<2;j++)
			{
				System.out.print(arr[i][j]+" ");
			}
			System.out.println();
		}
	}
}

Output

**A Program to Find the Reverse of a Two Dimensional Array in Java**

Further Reading