Java中的快樂或不快樂的數字，無法正常工作

Question

由於某種原因，這是行不通的，我不明白爲什麼。即使它是假的，它也會返回true，除此之外，其他一切似乎都能正常工作，除非它不會返回false。請幫忙！我是Java編程的新手，非常感謝有人抓住我的錯誤！

import javax.swing.JOptionPane; 

public class A2Q1 { 

    public static void main(String[] args) { 
     int number, input1, min, max; 
     String input; 
     boolean trueFalse; 

     //constants 
     min = 0; 
     max = 1000000; 

     input = JOptionPane.showInputDialog(null, "Input number -1 to quit"); 
     input1 = Integer.parseInt(input); 

     while (input1 != -1) { 
      number = getNumber(min, max); // gets the number the user wants to test 
      trueFalse = isHappy(number); //tests if the number is happy or unhappy 

      //getting the returned value and telling the user if it is happy or unhappy 
      if (false) { 
       System.out.println(number + " is unhappy"); 
      } else { 
       System.out.println(number + " is happy"); 
      } 

      //getting input from the user to continue to quit 
      input = JOptionPane.showInputDialog(null, input number - 1 to quit"); 
      input1 = Integer.parseInt(input); 
     } 
     System.out.println("End of Processing"); 
    } 

    public static int getNumber(int min, int max) //get the number from the user 
    { 
     //declaring variables 
     String input; 
     int number; 
     //getting input from the user for the value they want to test 
     input = JOptionPane.showInputDialog(null, 
     "What is the value you 

     number = Integer.parseInt(input); 

     if (number > 0 && number < 100000) { 
      return number; 
     } else { 
      System.out.println("You have entered an invalid number"); 
      return number; 
     } 
    } //closing getNumber 

    public static boolean isHappy(int number) { 
     //declaring variables 
     int digit1, digit2, digit3, sum; 

     while (number != 0 && number != 1 && number != 4 && number != 16 && number != 20 
       && number != 37 && number != 42 && number != 58 && number != 89 && number != 145) { 
      digit1 = number % 1000; 
      digit1 = digit1/100; 
      digit2 = number % 100; 
      digit2 = digit2/10; 
      digit3 = number % 10; 
      digit1 *= digit1; 
      digit2 *= digit2; 
      digit3 *= digit3; 
      number = digit1 + digit2 + digit3; 
     } 

     if (number == 1) { 
      return true; 
     } else { 
      return false; 
     } 

    } //closing isHappy 
}//closing public class 

Answer 1

您的問題是這裏。

trueFalse = isHappy(number); //tests if the number is happy or unhappy 

    //getting the returned value and telling the user if it is happy or unhappy 
    if (false) 
    { 
    System.out.println(number + " is unhappy"); 
    } 
    else 
    { 
    System.out.println(number + " is happy"); 
    } 

條件if(false)永遠不會成立。您希望它是if(trueFalse)，並且將「真」分支和它下面的「假」分支交換。