continue

break leaves the loop. Its partner continue only skips the rest of this round: the loop goes straight back to its start and carries on. It's handy for skipping input that shouldn't be handled:

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        while (true) {
            int number = Integer.valueOf(scanner.nextLine());
            if (number == 0) {
                break;
            }
            if (number % 2 != 0) {
                System.out.println(number + " is odd, skipped");
                continue;
            }
            System.out.println("Half of " + number + " is " + number / 2);
        }
    }
}

8
5
12
0

Half of 8 is 4
5 is odd, skipped
Half of 12 is 6

For 5 the continue runs, so the "Half of" line is skipped for that round only. The loop then reads 12 as usual.

A loop often starts with its checks, each ending in break or continue, and then does the real work for the input that got through them.