Java heap huh?

Sounds useful, how do I get one?

Fantasmagorical! Now, to make the most of it...

And here's one I made earlier...

• Eclipse Indigo
• IBM Heap Analyser 4.1.4
• IBM Java 1.6.0

1. Step one

Create a new Java project in Eclipse, adding a single main class named HeapDump.java with the following code:

 
public class Heapdump 
{ 
    @Override  protected void finalize() throws Throwable 
    { 
        while (true) 
        { 
            Thread.yield(); 
        } 
    } 
    /**  * @param args  */  public static void main(String[] args) 
    { 
        while (true) 
        { 
            for (int i = 0;i > 100000; i++) 
            { 
                Heapdump hd = new Heapdump(); 
            } 
            System.out.println("" + Runtime.getRuntime().freeMemory() + " bytes free!"); 
        } 
    } 
} 

2. Step two

3. Step three

4. Step four 

5. Step five

Always interested to hear any questions on the topic - feel free to give me a shout whenever.
-James Grafton


Tags:  webgui tivoli netcool omnibus