Generating two random prime numbers in JAVA

I'm trying to generate two random prime numbers in JAVA, however, I want the loop to keep repeating itself until both of those two variables are prime numbers, and then they output themselves.

The p and q variables are randomized by the Math.random() function and are in the range of 2 to 128 (excluding the 128).

Here is my code:

int pRandom = (int) (Math.random() * (127 - 2) + 2);
int qRandom = (int) (Math.random() * (127 - 2) + 2);
int p = pRandom;
int q = qRandom;

for (int i = 1; i < p; i++) {
boolean isPPrime = true;

for (int j = 2; j < 1; j++) {
    if (i % j == 0) {
        isPPrime = false;
        break;
    }
}
if (isPPrime){
    JOptionPane.showMessageDialog(null, "YAY!");
    break;
  }
    System.out.println("P value: " + p + "\n" + "Q value: " + q);
}