// Load required classes
import java.util.Scanner;
import java.io.File;
public class Exercise{
public static void main(String[] args) throws Exception{
// Scanner variable
Scanner reader;
// If an argument is present,
// we are reading from a file
// specified in args[0]
if(args.length > 0){
  reader = new Scanner(new File(args[0]));
// If no argument, read from System.in
}else{
  reader = new Scanner(System.in);
}

<mark>/* -=-=-=-=- MORE CODE GOES HERE -=-=-=-=- */</mark>

}
}

Skeleton

int m = reader.nextInt();
int n = reader.nextInt();
if(m > 0 && n > 0){
}else{
System.out.println(“Error - Invalid Input!");
}

Handle Input

int m = reader.nextInt();
int n = reader.nextInt();
if(m > 0 && n > 0){
int[][] array = new int[m][n];
}else{
System.out.println(“Error - Invalid Input!");
}

Create 2D Array

int m = reader.nextInt();
int n = reader.nextInt();
if(m > 0 && n > 0){
int[][] array = new int[m][n];
for(int i = 0; i < m; i++){
for(int j = 0; j < n; j++){
array[i][j] = reader.nextInt();
}
}
}else{
System.out.println(“Error - Invalid Input!");
}

Fill Array

int m = reader.nextInt();
int n = reader.nextInt();
if(m > 0 && n > 0){
int[][] array = new int[m][n];
for(int i = 0; i < m; i++){
for(int j = 0; j < n; j++){
array[i][j] = reader.nextInt();
}
}
for(int j = 0; j < n; j++){
for(int i = 0; i < m; i++){
System.out.print(array[i][j] + " “);
}
System.out.println();
}
}else{
System.out.println(“Error - Invalid Input!");
}

Transpose