# How to populate a 2d array with random alphabetic values from a range in Java?

To populate a 2d array with random alphabets, use the Random class. Let us first declare a 2d array −

char arr[][] = new char;

Now, in a nested for loop, use the Random class object to get random values on the basis of switch case. Here, our range is 3 i.e. set of 3 alphabets at once −

Random randNum = new Random();
for (int i = 0; i < 3; i++) {
for (int j = 0; j < 3; j++) {
int x = randNum.nextInt(3);
switch (x) {
case 0: {
arr[i][j] = 'p';
break;
}
case 1: {
arr[i][j] = 'q';
break;
}
.
.
.
}
}
}

Now, for the string representation of the random alphabets in a range, which is 3 −

Arrays.deepToString(arr)

## Example

Live Demo

import java.util.Arrays;
import java.util.Random;
public class Demo {
public static void main(String[] args) {
char arr[][] = new char;
Random randNum = new Random();
for (int i = 0; i < 3; i++) {
for (int j = 0; j < 3; j++) {
int x = randNum.nextInt(3);
switch (x) {
case 0: {
arr[i][j] = 'p';
break;
}
case 1: {
arr[i][j] = 'q';
break;
}
case 2: {
arr[i][j] = 'r';
break;
}
case 3: {
arr[i][j] = 's';
break;
}
case 4: {
arr[i][j] = 't';
break;
}
case 5: {
arr[i][j] = 'u';
break;
}
case 6: {
arr[i][j] = 'v';
break;
}
case 7: {
arr[i][j] = 'w';
break;
}
}
}
}
System.out.println("Random alphabets...");
System.out.println(Arrays.deepToString(arr));
}
}

## Output

Random alphabets...
[[q, q, p], [p, p, q], [p, p, p]]