Get specific length random number in Java:
import java.util.Random;
public class RandomJavaProgram {
public static void main(String []args) {
RandomNumber RandomNumberObj = new RandomNumber();
System.out.println(RandomNumberObj.getRandomNumber(3));
}
}
class RandomNumber {
public String getRandomNumber(int digitLength) {
int[] numberContainer = new int[digitLength];
String mainRandomNumber = "";
Random rand = new Random();
for ( int i = 0; i < digitLength; i++ ) {
numberContainer[i] = rand.nextInt(10);
}
for ( int j = 0; j < digitLength; j++ ) {
mainRandomNumber = mainRandomNumber + String.valueOf(numberContainer[j]);
}
return mainRandomNumber;
}
}
