부울 함수가 제대로 작동하지 않습니다.

Question

이 작은 프로그램을 재미있게 만들었으며 인터페이스 작동 방식을보고 싶었습니다. eatsOrNot 함수에 "iarba"를 입력하면 dog 객체에 대해 거짓이 발생해야합니다. 부울 함수에서 내가 뭘 잘못하고 있니?

package animals; 

    public interface Actions { 


void Sound(); 
boolean eatsOrNot(String s); 
void guessNumberOfLegs(int x); 


} 


package animals; 

public class Dog implements Actions { 



public boolean eatsOrNot(String s) 
{ 
    if (s=="paine"||s=="morcovi"||s=="iarba") return false; 
    else return true; 

} 


public void Sound() { 
    System.out.println("Dog goes 'woof'"); 
} 

public void guessNumberOfLegs(int x) { 
    if (x==4) 
     System.out.println("Right!"); 
    else System.out.println("Wrong!"); 
} 


      } 




package animals; 

public class Rabbit implements Actions { 



    public boolean eatsOrNot(String s) 
    { 
     if (s=="fier") return false; 
     else return true; 
    } 


    public void Sound() { 
     System.out.println("Rabbit goes bla"); 
    } 

    public void guessNumberOfLegs(int x) { 
     if (x==4) 
      System.out.println("Right!"); 
     else System.out.println("Wrong!"); 
    } 


} 



package animals; 

import java.io.BufferedReader; 
import java.io.IOException; 
import java.io.InputStreamReader; 
import java.util.Scanner; 


public class TestAnimals { 

    public static void main(String[] args) throws IOException { 
     // TODO Auto-generated method stub 
     Scanner in= new Scanner(System.in); 
     BufferedReader in1=new BufferedReader(new InputStreamReader(System.in)); 
     Dog dog=new Dog(); 
     Rabbit rabbit=new Rabbit(); 

     System.out.println("Rabbit sound:"); 
     rabbit.Sound(); 
     System.out.println("Dog sound:"); 
     dog.Sound(); 

     System.out.println("Guess number of a dog's legs:"); 
      int legs=in.nextInt(); 
      dog.guessNumberOfLegs(legs); 
      System.out.println("Guess number of a rabbit's legs:"); 
      legs=in.nextInt(); 
      dog.guessNumberOfLegs(legs); 


      System.out.println("The dog eats or not : "); 
       String str=in1.readLine(); 
       dog.eatsOrNot(str); 
       System.out.println(dog.eatsOrNot(str)); 

      System.out.println("The rabbit eats or not : "); 
      String str1=in1.readLine(); 
      rabbit.eatsOrNot(str1); 
      System.out.println(rabbit.eatsOrNot(str1)); 








    } 

} 

Answer 1

당신은 ==를 사용하여 String의를 비교하고 있습니다. 대신 equals 방법을 사용하십시오.

Answer 2

문자열을 ==과 비교하지 말고 방법은 equals()입니다.