Terminating Java User Input While Loop-CodePudding

I am learning Java day 1 and I have a very simple code.

public static void main(String[] args) {
     Scanner input = new Scanner(System.in);
     while(input.hasNext()) {
        String word = input.next();
        System.out.println(word);
    }
}

After I input any sentence, the while loop seems to not terminate. How would I need to change this so that the I could break out of the loop when the sentence is all read?

CodePudding user response：

The hasNext() method always checks if the Scanner has another token in its input. A Scanner breaks its input into tokens using a delimiter pattern that matches whitespace by default.

Whitespace includes not only the space character, but also tab space (\t), line feed (\n), and more other characters

hasNext() checks the input and returns true if it has another non-whitespace character.

Your approach is correct if you want to take input from the console continuously. However, if you just want to have single user input(i.e a sentence or list of words) it is better to read the whole input and then split it accordingly.
eg:-

String str = input.nextLine();
for(String s : str.split(" ")){
    System.out.println(s);
}

CodePudding user response：

Well, a simple workaround for this would be to stop whenever you find a stop or any set of strings you would like!

    Scanner input = new Scanner(System.in);

    while (input.hasNext()) {
        String word = input.next();
        if (word.equals("stop")) {
            break;
        }
        System.out.println(word);
    }
    input.close();
    System.out.println("THE END!");