Switch в java

int points;
 
        points = (int) Math.floor(Math.random() * 2390 + 1);
 
        switch (points){
 
            case 0-1000: {points = 100; break;}
            case 1001-1500: {points = 300; break;}
            case 1501-1900: {points = 500;  break;}
            case 1901-2200: {points = 1000; break;}
            case 2201-2300: {points = 3000; break;}
            case 2301-2350: {points = 5000; break;}
            case 2351-2380: {points = 10000; break;}
            case 2381-2390: {points = 100000; break;}
            default: {throw new RandomNumberNotFoundException("Error #101! Random number hasn't been processed by the System!");}
        }

private void generateRandomPoint() {
        int points;
 
        points = (int) Math.floor(Math.random() * 2390 + 1);
 
        if (points >= 0 && points <= 1000) {
            points = 100;
        } else if (points >= 1005 && points <= 1500) {
            points = 300;
        } else if (points >= 1501 && points <= 1900) {
            points = 500;
        } else if (points >= 1901 && points <= 2200) {
            points = 1000;
        } else if (points >= 2201 && points <= 2300) {
            points = 3000;
        } else if (points >= 2301 && points <= 2350) {
            points = 5000;
        } else if (points >= 2351 && points <= 2380) {
            points = 10000;
        } else if (points >= 2381 && points <= 2390) {
            points = 100000;
        } else {
            throw new RandomNumberNotFoundException("Error #101! Random number hasn't been processed by the System!");
        }   
    }