java - 如何在用户输入数据后重新运行java代码

Question

嘿，我有一个基本的java“应用程序”，显示人们是成年人还是青少年等。我开始使用java，但在用户输入年龄后，我找不到如何制作它，并且它们被分类的字符串显示我希望它再次重新运行整个过程，以便其他人可以尝试一下。我一直在考虑做一个循环，但这对我来说没有用。这是代码:

    public static void main(String[] args)
{
    //Declare local variables
    int age;
    Scanner in = new Scanner(System.in);

    //Prompt user for Age
    System.out.print("Enter Age: ");
    age = in.nextInt();

    if(age > 17)
    {
        System.out.println("This persons age indicates that they an adult");
    }
    else if (age > 12)
    {
        System.out.println("This persons age indicates that they are a teenager");
    }
    else if (age >= 0)
    {
        System.out.println("This persons age indicates that they are a child");
    }
    else
    {
        System.out.println("That age is invalid");
    }

    //Close input
    in.close();
}

任何帮助将不胜感激。我确信这非常简单，但我错过了一些东西。

Answer 1

你可以把它放在一个循环中，例如

 public static void main(String[] args)
{
    //Declare local variables
    int age;
    Scanner in = new Scanner(System.in);
while(true){
    //Prompt user for Age
    System.out.print("Enter Age: ");
        age = in.nextInt();

        if(age > 17)
        {
            System.out.println("This persons age indicates that they an adult");
        }
        else if (age > 12)
        {
            System.out.println("This persons age indicates that they are a teenager");
        }
        else if (age >= 0)
        {
            System.out.println("This persons age indicates that they are a child");
        }
        else
        {
            System.out.println("That age is invalid");
        }
}

        //Close input
        in.close(); //Note that this happens outside the loop
    }

或者将所需的代码放入方法中

public static void ageCheck()
{
  //code that is currently in main method
}

它将由 main 方法调用

this.ageCheck();