我想寫一個personclass和Java中

Question

到目前爲止我personClass一個personTester，我有以下幾點：

package personclass; 

public class Personclass { 
private static boolean Personclass; 
private int PersonCount; 
    public int getPersonCount() 
    { 
     return PersonCount; 
    } 

    private String FirstName; 
    private String LastName; 
    private int Age; 
    private Double Height; 
    private String Gender; 

    public Personclass(String foreName, String surName, int age, Double height, String gender) 
    { 
     FirstName = foreName; 
     LastName = surName; 
     Age = age; 
     Height = height; 
     Gender = gender; 
    } 

    private String getFirstName() 
     { 
    return FirstName; 
} 

private void setFirstName(String foreName) 
{ 
    this.FirstName = foreName; 
} 

private String getLastName() 
{ 
    return LastName; 
} 

private void setLastName(String surName) 
{ 
    this.LastName = surName; 
} 

private int getAge() 
{ 
    return Age; 
} 

private void setAge(int age) 
{ 
    this.Age = age; 
} 

private Double getHeight() 
{ 
    return Height; 
} 

private void setHeight(Double height) 
{ 
    this.Height = height; 
} 

private String getGender() 
{ 
    return Gender; 
} 

private void setGender(String gender) 
{ 
    this.Gender = gender; 
} 

/** 
* 
* @param FirstName 
* @param LastName 
* @param Age 
* @param Height 
* @param Gender 
*/ 
public Personclass(String FirstName, String LastName, int Age, double Height, String Gender) 
{ 
    this.FirstName = FirstName; 
    this.LastName = LastName; 
    this.Age = Age; 
    this.Height = Height; 
    this.Gender = Gender; 
      ++PersonCount; 
} 

/** 
* 
* @return 
*/ 

@Override 
public String toString() 
{ 
     return "Person[forename=" + getFirstName() + ", surname=" + getLastName() + ", age=" + getAge() + ", height=" + getHeight() +"m" + ", gender=" + getGender() +"]"; 
} 
public String format() 
{ 
     return String.format("%10s %10s %10d %10.2f %10s", getFirstName() , getLastName() , getAge() , getHeight() , getGender()); 
} 

public static void main(String[] args) 
{ 

} 
} 

而對於我personTester，我有以下代碼：

package personclass; 

public class PersonTester 
{ 
public static void main(String[] args) 
{ 

     Person person1 = new Person("Joe","Smith",25,1.57,"Male"); 

     Person person2 = new Person("Sain","Davies",18,1.73,"Female"); 

     Person person3 = new Person("John","White",22,1.60,"Male"); 

     Person person4 = new Person("Martin","Taylor",26, 1.54,"Male"); 

     Person person5 = new Person("Jessica","Clarke",19,1.70,"Female"); 

     System.out.println(person1.toString()); 
     System.out.println(person2.toString()); 
     System.out.println(person3.toString()); 
     System.out.println(person4.toString()); 
     System.out.println(person5.toString()); 

} 
} 

當我嘗試運行personTester時，遇到麻煩的事情是不打印任何東西。我如何去嘗試印出五個不同的人？

Answer 1

您需要在PersonTester類Personclass中的main（）中創建對象。這應該使您能夠通過該類中的toString（）方法打印有關人員的信息。

Answer 2

可能有兩種可能的解決方案。

1. 你應該確保你正在運行的PersonTester類，但不Personclass。即如果從命令行運行，則應該使用java PersonTester命令。

2. 您的班級名稱是Personclass，但在您的PersonTester班級中，您指的是某些Person班級。您應該將Personclass更改爲以下內容。

   包personclass;

   public class PersonTester{ 
   
        public static void main(String[] args) { 
   
         Personclass person1 = new Personclass ("Joe","Smith",25,1.57,"Male"); 
         Personclass person2 = new Personclass ("Sain","Davies",18,1.73,"Female"); 
         Personclass person3 = new Personclass ("John","White",22,1.60,"Male"); 
         Personclass person4 = new Personclass ("Martin","Taylor",26, 1.54,"Male"); 
         Personclass person5 = new Personclass ("Jessica","Clarke",19,1.70,"Female"); 
   
         System.out.println(person1.toString()); 
         System.out.println(person2.toString()); 
         System.out.println(person3.toString()); 
         System.out.println(person4.toString()); 
         System.out.println(person5.toString()); 
        } 
       }