Question

您好我编写了我的代码并且所有代码都工作，除了Zero用作退出方式，我需要它不要在我的数组列表的末尾打印。

import java.util.*;


public class Question1 
{

public static void main(String[] args)
{
    Scanner keyboard = new Scanner(System.in);
    int user_input;     

    List<Integer> number_list = new ArrayList<Integer>();
    do
    {
        System.out.println("Enter an integer (0 to exit)");
         user_input = keyboard.nextInt();
         number_list.add(user_input);               
    } 
    while (user_input!=0);
    System.out.println("Got it.  You entered:");        
    for (int numbers : number_list)
    {
            System.out.println(numbers);                    
    }   
}
}

任何帮助将不胜感激，谢谢。

Answer 1

更改

 do
    {
        System.out.println("Enter an integer (0 to exit)");
         user_input = keyboard.nextInt();
         number_list.add(user_input);               
    } 
    while (user_input!=0);

到

do
    {
        System.out.println("Enter an integer (0 to exit)");

         user_input = keyboard.nextInt();
         if(user_input !=0)
           number_list.add(user_input);      
    } 
    while (user_input!=0);

应该做的伎俩。这样，唯一要添加的值是非零值。

Answer 2

我改变了你的代码以做你想做的事情：

public class HelloWorld {
public static void main(String[] args)
{
Scanner keyboard = new Scanner(System.in);
int user_input;     

List<Integer> number_list = new ArrayList<Integer>();
do
{
    System.out.println("Enter an integer (0 to exit)");
     user_input = keyboard.nextInt();
     number_list.add(user_input);               
} 
while (user_input!=0);
if (number_list.size()  > 1) {
      System.out.println("Got it.  You entered:");        
for (int i =0; i< number_list.size() -1 ;i ++)
{
        System.out.println(number_list.get(i));                    
}   

}

}
}

Answer 3

do {  System.out.println("Enter an integer (0 to exit)");     
    user_input = keyboard.nextInt();
    if(user_input!=0){
     number_list.add(user_input);   }            
} 
while (user_input!=0);

阻止Java在我的数组列表中打印Zero

3 个答案: