java random

1import java.util.Random;
2
3Random rand = new Random();
4
5// Obtain a number between [0 - 49].
6int n = rand.nextInt(50);
7
8// Add 1 to the result to get a number from the required range
9// (i.e., [1 - 50]).
10n += 1;

1import java.util.Random;
2
3class scratch{
4    public static void main(String[] args) {
5        Random rand = new Random();
6        System.out.println( rand.nextInt(5) );
7        //prints a random Int between 0 - 4 (including 0 & 4);
8    }
9}

1import java.util.Random();
2Random <name> = new Random();
3<variable> = <name>.nextInt(<excuslive top limit>);

1import java.util.Random;
2public class Example {
3   public static void main(String[] args) {
4      Random rd = new Random(); // creating Random object
5      System.out.println(rd.nextFloat()); // displaying a random float value between 0.0 and 1.0
6   }
7}

1Random rand = new Random(System.currentTimeMillis());

1String id = UUID.randomUUID().toString();