What condition to break out of loop when enter is hit in standard input in Java?

I want to read from a line of string input word for word (that's why im using a while and scanner.next() instead of scanner.nextLine()). Reading works just fine, but I can't break from the loop cause i can't seem to find a good condition for that. It keeps taking input from the command line. Thanks in advance. Here is the code:

import edu.princeton.cs.algs4.StdRandom;
import java.util.Scanner;

public class RandomWord {

	public static void main(String[] args) {
		String x = null, winner = null;
		Scanner sc = new Scanner(System.in);
		int i = 1;
		while(true)
		{
			x = sc.next();
			if (!sc.hasNext())
			{
				break;
			}
			System.out.println(x);
			if(StdRandom.bernoulli(1/i))
			{
				winner = x;
			}
			i++;
		}
		sc.close();
		System.out.println(winner);
	}
}

I tried various functions but none worked.

Having a .next() call before a .hasNext() completely defeats the purpose of the .hasNext() call.

I would suggest using sc.hasNext() as the while condition.

To only read one line of input can be very easily achieved with two scanners.
One to read one line of console input, and another one to process that input.
This has the side-effect, of the input not being processed until the whole line is inputted.

import edu.princeton.cs.algs4.StdRandom;
import java.util.Scanner;

public class RandomWord {

    public static void main(String[] args) {
        String x = null, winner = null;
        final Scanner scl = new Scanner(System.in);
        int i = 1;
        final Scanner sc = new Scanner(scl.nextLine());
        while(sc.hasNext())
        {
            x = sc.next();

            System.out.println(x);
            if(StdRandom.bernoulli(1/i))
            {
                winner = x;
            }
            i++;
        }
        sc.close();
        scl.close();
        System.out.println(winner);
    }
}

If you want to be able to read more than one line of input, you can do

while (sc.hasNext()) {
    x = sc.next()
    ...
}

And end your input by pressing ctrl-D (on Linux) or ctrl-Z (on Windows) at the start of a new line to signal end of input.

Otherwise, if you want to read only one line, use C0D3 M4513R's answer.

 Scanner scanner = new Scanner(System.in);
    while (true) {
        System.out.println("Press Enter to continue...");
        String input = scanner.nextLine();
        if (input.equals("")) {
            break;
        }
    }
    System.out.println("Loop exited.");

You can read the whole line and use StringTokenizer to get the tokens and assign them to x while iterating:

public static void main(String[] args) {
    String x = null, winner = null;
    Scanner sc = new Scanner(System.in);
    StringTokenizer tokenizer = new StringTokenizer(sc.nextLine());
    int i = 1;
    while(tokenizer.hasMoreTokens())
    {
        x = tokenizer.nextToken();
        System.out.println(x);
        if(StdRandom.bernoulli(1/i))
        {
            winner = x;
        }
        i++;
    }
    sc.close();
    System.out.println(winner);
}