SCJP 1.6版考題 219
Given:
1. public class Threads2 implements Runnable{
2.
3. public void run(){
4. System.out.println("run.");
5. throw new RuntimeException("Problem");
6. }
7. public static void main(String[] args){
8. Thread t = new Thread(new Threads2());
9. t.start();
10. System.out.println("End of method.");
11. }
12. }
Which two can be results? (Choose two.)
A. java.lang.RuntimeException: Problem
B. run.
java.lang.RuntimeException: Problem
C. End of method.
java.lang.RuntimeException: Problem
D. End of method.
run.
java.lang.RuntimeException: Problem
E. run.
java.lang.RuntimeException: Problem
End of method.
解答
Ans: D E
解說:
main執行緒新建一條執行緒(第8行)後於第9行啟動此條執行緒,會有二個可能:
1.main執行緒先跑完,再執行該執行緒,參考答案D 2.該條執行緒先跑完再執行main,答案E。
throw new RuntimeException("Problem");
這條指令是丟出一個RuntimeException的例外物件,其中Problem是要顯示的例外訊息。
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