public static void main(String args[]) {

int maxValue = 50; // The maximum value to be checked.

// Check all values from 2 to maxValue:

for(int i = 2 ; i <= maxValue ; ++i) {

// Try dividing by all integers from 2 to square root of i:

for(int j = 2 ; j <= Math.sqrt(i) ; ++j) {

if(i%j == 0) // This is true if j divides exactly

continue OuterLoop; // so exit the loop.

}

// We only get here if we have a prime:

System.out.println(i); // so output the value.

}

}