Demo_4.java

import java.util.Arrays;

class TransposeMatrix{
 // public int[][] transpose(int[][] matrix) {
 // for(int i=0;i<matrix.length;i++){
 // for(int j=1;j<matrix[i].length;j++){
 // int temp = matrix[i][j];
 // matrix[i][j] = matrix[j][i];
 // matrix[j][i] = temp;
 // }
 // }
 // return matrix;
 // }

 public int[][] transpose(int[][] matrix) {
 int[][] arr = new int[matrix[0].length][matrix.length];
 for(int i=0;i<matrix.length;i++){
 for(int j=0;j<matrix[i].length;j++){
 arr[i][j] = matrix[j][i];
 }
 }
 return arr;
 }
}
public class Demo_4 {
 public static void main(String[] args) {
 TransposeMatrix tm = new TransposeMatrix();
 int[][] matrix = {{1,2,3},{4,5,6},{7,8,9}};
 // Output: [[1,4,7],[2,5,8],[3,6,9]]
 System.out.println(Arrays.deepToString(tm.transpose(matrix)));

 }
}