while (true) {
    int random = new Random().nextInt(100);

    if (random < 5) {
        finalValue = 1;
        break;
    } else if (random < 10) {
        finalValue = 2;
        break;
    } else if (random < 50) {
        finalValue = 3;
        break;
    } else if (random < 70) {
        finalValue = 4;
        break;
    }
}
System.out.printf(finalValue);