Question

嘿，我有一个基本的java'应用程序'显示人们是成人还是青少年等。我开始使用java，但是在用户输入年龄之后我找不到如何做到这一点，并且他们被归类为节目的字符串我希望它重新运行整个事情，所以其他人可以去。我一直在研究做一个循环，但这对我来说没有问题。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();
}

非常感谢任何帮助。我确信它非常简单，我错过了一些东西。

Answer 1

您可以将其置于循环中，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
    }

或将所需代码放入方法

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

将通过

从主方法调用

this.ageCheck();

Answer 2

你可以做一段时间（真实）循环来永远运行

Answer 3

您可以递归拨打main()

在此in.close();声明之后，只需按此main()致电

 in.close();
  main(null);

但是你必须在何时停止执行你的程序。

如何在用户输入数据后重新运行java代码

3 个答案: