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너와나의 관심사

java Thread callback 함수 구현 본문

프로그램 정리/JAVA스터디

java Thread callback 함수 구현

벤치마킹 2022. 3. 29. 22:42
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package study;
 
import java.util.concurrent.Future;
import java.util.logging.Handler;
import javax.security.auth.callback.Callback;
 
public class Ex13_1 {
    
    interface Callback {
        void printState(int n);
    }
    
    public static void main (String args[]) {
        
        
        // B에서 호출할 콜백 메소드 오버라이딩
        Callback callback = new Callback() {
            @Override
            public void printState(int n) {
 
                if (n > 0) {
                    System.out.printf("-- Thread 가 동작 중입니다 (%d%%) \n", n*10);
 
                } else {
                    System.out.println("--Thread 동작이 완료 하였습니다~!");
 
                }
            }
        };
        
        Thread t1 = new Thread (new ThreadEx1_1(callback));
        Thread t2 = new Thread (new ThreadEx1_2());
        
        t1.start();
        t2.start();
        
        System.out.println("Main call Done");
    }
    
}
 
class ThreadEx1_1 extends Thread{
    
    
    Ex13_1.Callback callback;
 
    // 생성자로 오버라이딩 된 callback 객체를 받음
    ThreadEx1_1(Ex13_1.Callback callback) {
        this.callback = callback;
    }
    
    
    public void run() {
        
        for(int i =0 ;i < 100; i ++) {
            System.out.println(0);
        }
        
        callback.printState(-1); //thread 에서 동작 종료를 불러주는 역활 //
    }
    
}
 
class ThreadEx1_2 extends Thread {
    
    public void run() {
        
        for(int i =0 ;i < 100; i ++) {
            System.out.println(1);
        
        }
    }
}
 
 
 
 
 cs
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