多选题 Given:
2. class Jiggy extends Thread {
3. Jiggy(String n) { super(n); }
4. public void run() {
5. for(int i = 0; i < i00; i++) {
6. if("tl".equals(Thread.currentThread() .getName( ) && i == 5) {
7. new Jiggy("t3") .start() ;
8. throw new Error();
9. }
10. if("t2".equals(Thread.currentThread() .getName()) && i == 5) {
11. new Jiggy("t4") .start();
12. throw new Error();
13. }
14. System.out.print (Thread.currentThread() .getName() + "-");
15. }
16. }
17. public static void main(String[] args) {
18. Thread t1 = new Jiggy("t1");
19. Thread t2 = new Jiggy("t2");
20. t1.setPriority(1); t2.setPriority(9);
21. t2.start(); t1.start();
22. } }
Which are true? (Choose all that apply.)