Question

我刚刚尝试注册，目前正在进行练习，试图找出它。这是代码。

public class Person {
    String name;

    public Person(String personName) {
        name = personName;
    }

    public String greet(String yourName) {
        return String.format("Hi %s, my name is %s", name, yourName);
    }
}

这些是我所做的改变，当时似乎有意义，但我仍然会通过它来找到有效的方法

public class Person {
    String name;

    public Person(String personName) 
    {
        name = "John";
    }

    public String greet(String "Tommy");
    {
        return String.format("Hi %s, my name is %s", name, yourName);
    }
}

如果我将它粘贴到Eclipse中并从那里运行它是否会作弊？

我希望这很清楚，如果我有任何方法可以改进这篇文章或让任何事情更清楚，请告诉我:)谢谢！

Answer 1

你只需要在String.format（）函数中交换name和yourName，参见下面的代码

return String.format("Hi %s, my name is %s", yourName, name);

public class Person {

  String name;

    public Person(String personName) {
      name = personName;
   }

    public String greet(String yourName) {
      return String.format("Hi %s, my name is %s", yourName, name);
    }
}

Answer 2

以下代码中的更正和评论。如果你学习一些语言的基础知识，你将会理解一切，否则它会很有趣。

public class Person {
    String name;

    //This is a constructor and invoked during creation of object
    public Person(String personName) 
    {
            //makes no sense to pass personName to construct but, not use it
            //name = "John";
            name = personName; 
    }

    //A method signature does not end with semi-colon
    //You cannot pass string literal in function as argument, "Tommy" incorrect arg
    //public String greet(String "Tommy");
    public String greet(String greeting)
    {
            //not sure where you come up with yourName but, i replaced with greeting arg
            return String.format("Hi %s, my name is %s", name, greeting);
    }

    //add main to show you how this works, when run execution enters main first
    public static void main(String[] args) {

        //an object of Person class is created passing "John" to its constructor      
        Person p  = new Person("John"); 

        //p.greet() invokes the greet method of Person object
        System.out.println(p.greet("Oops!")); 
    }
}

注册Codewars Java练习2

2 个答案: