Transpose

Program.java

import java.util.Arrays;
public class Program {
	
	public static void main (String args[]) {
		int[][] o = new int[][]{ 
			{ 1, 20, 10 },
			{ 6, 3, 18 } 
		};

		int[][] d = new int[o[0].length][o.length];
		
		for (int i = 0; i < o.length; i++) {
			for (int j = 0; j < o[i].length; j++) {
				d[j][i]=o[i][j];
			}
		}
		System.out.println(Arrays.deepToString(o));
		System.out.println(Arrays.deepToString(d));
	}
}

Program2.java

import java.util.Arrays;
public class Program {
	
	public static void main (String args[]) {
		int[][] o = new int[][]{ 
			{ 1, 20, 10 },
			{ 6, 3, 18 },
			{ 30, 2, 7 }
		};
		System.out.println(Arrays.deepToString(o));
		int tmp;
		for (int i = 0; i < o.length; i++) {
			for (int j = i+1; j < o[i].length; j++) {
				tmp = o[i][j];
				o[i][j]=o[j][i];
				o[j][i]=tmp;
			}
		}
		System.out.println(Arrays.deepToString(o));
	}
}