A Collection of Code Snippets in as Many Programming Languages as Possible

This project is maintained by TheRenegadeCoder

Welcome to the Prime Number in Java page! Here, you’ll find the source code for this program as well as a description of how the program works.

```
class PrimeNumberException extends Exception {
}
public class PrimeNumber {
public static boolean isPrime(int number) {
if ((number % 2 == 0 && number != 2) || number == 1) {
return false;
}
boolean foundFactor = false;
for (int n = 3; n <= (int) Math.ceil(Math.sqrt(number)); ++n) {
if ((number % n) == 0) {
foundFactor = true;
break;
}
}
return !foundFactor;
}
public static void main(String[] args) {
try {
if (args.length < 1 || args[0].indexOf('-') != -1) {
throw new PrimeNumberException();
}
if (isPrime(Integer.valueOf(args[0]))) {
System.out.println("Prime");
} else {
System.out.println("Composite");
}
} catch (NumberFormatException | PrimeNumberException e) {
System.err.println("Usage: please input a non-negative integer");
}
}
}
```

Prime Number in Java was written by:

- Ewerton Queiroz
- Ganesh Naik
- Jeremy Grifski
- Juan D Frias

If you see anything you’d like to change or update, please consider contributing.

**Note**: The solution shown above is the current solution in the Sample Programs repository as of Oct 10 2022 15:04:56. The solution was first committed on Oct 10 2019 02:15:05. As a result, documentation below may be outdated.

No ‘How to Implement the Solution’ section available. Please consider contributing.

No ‘How to Run the Solution’ section available. Please consider contributing.