[news.eclipse.technology.memory-analyzer] Re: Classes from rt.jar loaded

[radiatejava@xxxxxxxxx (Satish Burnwal)]

Andreas,
You may be right that different class loaders might reference the same 
classes but I just tried to convince myself on this. Can someone tell me 
when can a non-system classloader refer to a system class ? For example, I 
tried to run these 2 examples and take a heap dump while the thread is 
sleeping but I do not see TestCL referring to java.net.ServerSocket or 
java.util.concurrent.ConcurrentLinkedQueue:

//example1
import java.net.*;
import java.util.concurrent.*;
import java.util.*;

public class TestCL extends java.lang.ClassLoader {

	public static void main(String[] args) {
		TestCL loader = new TestCL();
		loader.load();
	}

	public void load() {
		try {
			String s = new String("satish");
			Vector v = new Vector(10);
			ServerSocket ss = new ServerSocket();
			ConcurrentLinkedQueue list = new ConcurrentLinkedQueue();
			System.out.println("TestCL...");
			Thread.sleep(100000000);
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

}

//example2
import java.net.*;
import java.util.concurrent.*;
import java.util.*;

public class TestCL extends java.lang.ClassLoader {

	public static void main(String[] args) {
		TestCL loader = new TestCL();		
		Thread t = new Thread(
				new Runnable() {
					public void run() {
						try {
							String s = new String("satish");
							Vector v = new Vector(10);
							ServerSocket ss = new ServerSocket();
							ConcurrentLinkedQueue list = new ConcurrentLinkedQueue();
							System.out.println("TestCL executed!!");
							Thread.sleep(100000000);
						} catch (Exception e) {
							e.printStackTrace();
						}
					}
				}, "TestThread");
		t.setContextClassLoader(loader);
		t.start();
		try {
			t.join();
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
}