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Homework 4
- (20 pts) For the following program, explain the interesting elements related to threads.
1 public class TaskThreadDemo {
2 public static void main (String args []) {
3 String [] sa = {"a", "X", "+", "."};
4 for (String s: sa) {
5 Runnable ps = new PrintChar (s, 200);
6 Thread ts = new Thread (ps, s);
7ts.start ();
8 } // end for each character
9} // end main
10} // end class TaskThreadDemo
11
12class PrintChar implements Runnable {
13String ch;
14int times;
15
16public PrintChar (String c, int n) {
17ch = c;
18times = n;
19} // end constructor
20
21public void run () {
22for (int i = 0; i < times; i++) {
23System.out.print (ch);
24} // end for loop
25} // end method run
26} // end class PrintChar
- (20 pts) What is changed if the method called on line 7, start(), is replaced with run()? Explain (of course).
- (20 pts) What is changed if the method Thread.yield() is added between lines 23 and 24? Explain.
