QUESTION 9

QUESTION 9 
Given: 
 
1. public class Threads3 implements Runnable { 
2.     public void run() { 
3.         System.out.print("running"); 
4.     } 
5.     public static void main(String[] args) { 
6.         Thread t = new Thread(new Threads3()); 
7.         t.run(); 
8.         t.run(); 
9.         t.start(); 
10.     } 
11. } 
 
What is the result? 
 
A. Compilation fails. 
B. An exception is thrown at runtime. 
C. The code executes and prints running. 
D. The code executes and prints runningrunning. 
E. The code executes and prints runningrunningrunning. 
Solution : E

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plus imformation 

class Threads 는 메서드 run을 가지고 있음 run은 running 을 출력함

Main문에서 class Threads에 대한 인스턴스를 하나 만듬 그게 t임

결국 threads의 run을 3번 실행 하는 꼴이 됨