Question

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);
    }
}

Answer 1

您的代码似乎很好..

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);
    }

    public static void main(String [] args)
    {
        Person p = new Person("Marcx");  // create an object Person
        System.out.println(p.greet("Ankit hacker")); //print the greet message
    }
}

将输出：Hi Marcx, my name is Ankit hacker

所以你可能是以错误的方式调用它

修改

正如Tom在评论中所做的那样，您可能想要更改name和yourName
的顺序

Answer 2

我能够理解您尝试使用此启动级代码执行的操作。你在这里缺少主要方法。这就是你无法执行它的原因。使用main方法

尝试以下代码

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);
    }

    public static void main(String args[])
    {
        Person p = new Person("A");
        System.out.println(p.greet("B"));
    }
}

$ javac Person.java
$ java Person
Hi A, my name is B

Answer 3

试试这个

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);
}

public static void main(String[] args) {
    Person p1 = new Person("Person1");
    System.out.print(p1.greet("Person2"));
}
}

输出是：

Hi Person1, my name is Person2

Answer 4

我没有看到任何代码问题。只是你应该有主要方法：）

greet函数不返回字符串值？

4 个答案: