Question

我试图弄清楚如何使用带有循环的scanner类。我不能使用break作为我的代码的一部分。我不确定我有多接近，但是我们非常感激任何帮助。

import java.util.Scanner;
public static void main(String[] args) {
    Scanner i = new Scanner(System.in);  
    System.out.print("Please enter a number between 1 and 10: ");
    int number = i.nextInt();
    boolean value = number>=1 && number <=10;
    while (number >=1 && number <=10){
        System.out.println ("Good Job!");
    }
        if  (number <=1 && number >=10  )
            continue;
        {System.out.print ("You have entered an incorrect number. Please try again");

            System.out.println("Please try again:");

            Scanner r = new Scanner(System.in);
            return;
                    }

Answer 1

可以像这样使用Scanner类：

import java.util.Scanner;
public static void main(String[] args) {
    Scanner scanner = new Scanner(System.in);
    // now loop while the scanner is available
    while(scanner.hasNext()) {
        // print out every single number input from standard input
        System.out.println("Scanner inputed from stdin is " + Integer.toString(scanner.nextInt()); 
    }
}

Answer 2

你可以这样做：

import java.util.Scanner;
import java.util.Stack;

public class ScannerDemo {

    public static void main(String args[]) {

        Scanner scan = new Scanner(System.in);
        while (scan.hasNext()) {
            String next = scan.next();
            if("quit".equals(next)) break;
            System.out.println("Element: " + next); 
        }

        scan.close();
    }
}

按quit退出。

Java循环使用Scanner类，我可以使用中断

2 个答案: