tests/gc/ThreadJava.java

   1 public class ThreadJava extends Thread {
   2         public static final int N=5;
   3         public static final int SLEEP=200;
   4         public static final int LEN=20;
   5
   6         public void run() {
   7                 while (true) {
   8                         double d = Math.sqrt(Math.PI);
   9                         String s = Double.toString(d);
  10                         double e = Double.parseDouble(s);
  11                         double f = Math.pow(e, 2);
  12                         long  l1 = Math.round(f);
  13                         long  l2 = Math.round(Math.PI);
  14                         if (l1 != l2)
  15                                 System.out.println("What is going on???");
  16                 }
  17         }
  18
  19         public static void main(String args[]) {
  20                 ThreadJava t = null;
  21
  22                 System.out.println("Creating and starting threads ...");
  23                 for (int i=0; i<N; i++) {
  24                         t = new ThreadJava();
  25                         t.start();
  26                 }
  27                 t = null;
  28
  29                 System.out.println("Sending Main-Thread to sleep ...");
  30                 try {
  31                         Thread.sleep(SLEEP);
  32                 } catch (Exception e) {
  33                         System.out.println("Exception while sleeping!");
  34                 }
  35
  36                 System.out.println("Forcing a collection ...");
  37                 System.gc();
  38
  39                 System.out.println("Finished.");
  40         }
  41 }