如何在 java 中的 do while 循环的 "while" 部分打印出来？

Question

这是我当前的代码。如果用户输入“0”，我希望它 return a System.out.println("Please enter a number above zero")。它目前只是重复，如果用户输入 0

目前，它检查用户是否输入了 0 并重复。

import java.util.Scanner;
public class MyProgram {
  public static void main(String[] args) {
    
    
    // call scanner for user input 
    Scanner in = new Scanner(System.in);
    // double for salary
    int salary = 0;
    double incomeTax = 0;//

    do {
      System.out.println("Please enter your salary?");
      try {
          salary = in.nextInt();
          // test if user enters something other than an integer 
      } catch (java.util.InputMismatchException e) { 
          System.out.println("Invalid input, only enter a number above 0");
          salary = Integer.MIN_VALUE; 
          in.next(); // consume the non-int so we don't get caught in an endless loop
      }
  } while (salary <= 0);  // loop as long as the salary is less than zero
  
  if (salary <= 18000 & salary > 0) {
    incomeTax = 0;
    System.out.println("your weekly income is $" + salary + ", you will pay no income tax this financial year.");
  }

    in.close();
  }
}

Answer 1

尽管我会在问题中添加预期值。出错时，您推荐的字符串可能会打印如下。希望我正确地理解了你的问题并且这回答了它。

    do {
      System.out.println("Please enter your salary? (> 0)");
      try {
          salary = in.nextInt();
          // test if user enters something other than an integer 
      } catch (java.util.InputMismatchException e) { 
          System.out.println("Invalid input, only enter a number above 0");
          salary = Integer.MIN_VALUE; 
          in.next(); // consume the non-int so we don't get caught in an endless loop
      }
      if (salary <= 0) {
         System.out.Println("Please enter a number above zero");
      }
  } while (salary <= 0);  // loop as long as the salary is less than zero

如何在 java 中的 do while 循环的 "while" 部分打印出来？

How can I print out in the "while" section of a do while loop in java?

java

printing