Name: akC45999			Date: 09/29/97



The specification of Thread.enumerate(Thread[]) method says that
only active threads are taken into account. However, jdk12M seems 
to count inactive threads also. 

// test is derived from javasoft.sqe.tests.api.java.lang.Thread.enumerate0101

import java.io.PrintStream;

class enumerate0101t extends Thread {
  boolean act; // must stay active?
  ThreadGroup group;

  enumerate0101t(ThreadGroup group, boolean act) {
	super(group, String.valueOf(act));
	this.group=group;
	this.act=act;
  }

  public void run() {
	if (!act) { return;}
	synchronized(group) {
		try {
			group.wait();
		} catch (InterruptedException e) {
		}
	}
  }

} // end class enumerate0101t



public class enumerate0101 { //implements Test {

  public static void main(String args[]) {
	ThreadGroup group=new ThreadGroup("enumerate0101");
// create 1 active and 2 inactive threads in this group:
	Thread activeThrd, nonActiveThrd1, nonActiveThrd2;
	activeThrd=new enumerate0101t(group, true);
	activeThrd.start();
	nonActiveThrd1=new enumerate0101t(group, false);
	nonActiveThrd1.start();
	nonActiveThrd2=new enumerate0101t(group, false); // no start
	try {
		nonActiveThrd1.join();
	} catch (InterruptedException e) {
	}
// call Thread.enumerate():
	Thread tarray[]=new Thread[10];
	int cnt0=activeThrd.enumerate(tarray);
	System.err.println("activeThrd.enumerate()="+cnt0);
// make activeThrd to finish:
	synchronized(group) {
		group.notify();
	}
  }

}



Running the test:
novo37% javac enumerate0101.java
novo37% setenv CLASSPATH .
novo37% java enumerate0101
activeThrd.enumerate()=3


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