Java 复杂的条件表达式，用户容易理解。

我编写了下面的Java代码，想问一下，如果用户输入的距离小于0，我如何继续向用户询问正确的距离？我是否每次都必须创建一个新变量，或者仅当距离>=0时才可以循环整个过程和getInt？非常感谢

public  class   W05Practical {
public  static  void    main(String []  args)   {
    System.out.println("Please enter the lengths/distance in meters:");
    int Distance = EasyIn.getInt();

    if (Distance >= 0) {
System.out.println("Thank you");
    }
    else { 
System.out.println("Distance can not be negative. \nPlease enter the appropriate distance:");
    }   
}
}

---

这是我对这个问题的建议。创建一个名为correctInput的布尔值，并让它监视输入是否正确

例如：

public  class   W05Practical {
    public  static  void   main(String[] args){
        boolean correctInput = false;

        while(!correctInput){
            System.out.println("Please enter the lengths/distance in meters:");
            int Distance = EasyIn.getInt();

            if (Distance >= 0) {
                System.out.println("Thank you");
                correctInput = true;
            }else { 
                System.out.println("Distance can not be negative. \nPlease enter the appropriate distance:");
            }  
        }    
    }
}