PTA显示Compiler did not create the expected binary

不知所措

 

package nn;

 import java.util.Scanner;    
 class Person{       
     private String name = null;
     private int age = 0;
     private boolean gender = false;
     private int id = 0;
     
     public Person() {    
         System.out.println("This is constructor");
         System.out.println(name+","+age+","+gender+","+id);
         System.out.println("Person [name="+name+", age="+age+", gender="+gender+", id="+id+"]");
     }
     
     public Person(String name, int age, boolean gender) {   
         this.name = name;
         this.age = age;
         this.gender = gender;
     }
       

     public String toString() {   
         System.out.println("Person [name="+this.name+", age="+this.age+", gender="+this.gender+", id="+0+"]");
         return name;
     }
     public String getName(){    
          return name;
      }
      public void setName(String name){
          this.name=name;
      }
      public int getAge(){
          return age;
      }
      public void setAge(int age){
          this.age=age;
      }
      public boolean getGender(){
          return gender;
      }
      public void setGender(boolean gender){
          this.gender=gender;
      }
      public int getId(){
          return id;
      }
      public void setId(int id){
          this.id=id;
      }

 
     public static void main(String[] args) {
         Scanner reader = new Scanner(System.in);
         int n = reader.nextInt();       
         Person[] per = new Person[n];     
         for(int i=0; i<per.length; i++) {   
             String name = reader.next();
             int age = reader.nextInt();
             boolean genter = reader.nextBoolean();
             per[i] = new Person(name,age,genter);
         }
        for(int x=per.length-1; x>=0;x--){ 
             per[x].toString();
         }
         
         per.toString();
         Person person = new Person(); 
     }
     }