Answer:
The java program is as follows:
import java.util.*;
public class Main{
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
Random r = new Random();
int x, y;
x = input.nextInt();
y = input.nextInt();
int[][] Array2D = new int[x][y];
for(int i = 0; i < x ; i++){
for(int j = 0; j < y; j++){ Array2D[i][j] = r.nextInt(9) + 1; }
}
for(int i = 0; i < x ; i++){
for(int j = 0; j < y; j++){ System.out.print(Array2D[i][j]+" "); }
System.out.println();
}
for(int i = 0; i < x ; i++){
for(int j = 1; j < y; j+=2){ System.out.print(Array2D[i][j]+" "); }
System.out.println();
}
}
}
Explanation:
This creates a random object
Random r = new Random();
This declares x and y as integers
int x, y;
This gets input for x
x = input.nextInt();
This gets input for y
y = input.nextInt();
This declares the 2D array
int[][] Array2D = new int[x][y];
The following iteration populates the array with integers 1 to 9
<em> for(int i = 0; i < x ; i++){</em>
<em> for(int j = 0; j < y; j++){ Array2D[i][j] = r.nextInt(9) + 1; }</em>
<em> }</em>
The following iteration prints all elements of the array
<em> for(int i = 0; i < x ; i++){</em>
<em> for(int j = 0; j < y; j++){ System.out.print(Array2D[i][j]+" "); }</em>
<em> System.out.println();</em>
<em> }</em>
The following iteration prints all elements on the even column
<em> for(int i = 0; i < x ; i++){</em>
<em> for(int j = 1; j < y; j+=2){ System.out.print(Array2D[i][j]+" "); }</em>
<em> System.out.println();</em>
<em> }</em>
<em />
