java random number between 1 and 0 code example

Example 1: java random number between 100 and 999

int upperBound = 999;
int lowerBound = 100;
int number = lowerBound + (int)(Math.random() * ((upperBound - lowerBound) + 1));

Example 2: java random number generator in range

int rand = ThreadLocalRandom.current().nextInt(x,y);