Thread wise CPU monitoring for Java process

We come across many occations where java application is hung or slow with high CPU usage. We want to analyze which thread is causing this high CPU usage.
Java 1.5 provides a API "ThreadMXBean.getThreadCPUTime()"
We can use the following code in anywhere in the JVM to get the thread wise CPU usage of that JVM.
ThreadMXBean threads = ManagementFactory.getThreadMXBean();
ThreadInfo[] threadInfos = threads.getThreadInfo( threads.getAllThreadIds() );
for( int i=0; i < threadInfos.length; i++ )
{
long cpuTimeCumulative = threads.getThreadCpuTime( threadInfos[ i ].getThreadId() ); // in nano seconds
}
There is a utility called JTop available with JDK 1.6 (JDK_insall_dir/demo/management/JTop). This can be invoked as a JConsole plugin as well.
You can invoke the JConsole with plugin as follows:
/bin/jConsole.exe -pluginpath
eg: c:/jdk160/bin/jConsole.exe -pluginpath c:/jdk160/demo/management/JTop/JTop.jar
The default JTop shows only the cumulative CPU time (not the current CPU usage as if in Task manager).
I have modified the JTop little bit to include the current CPU usage as well.
You can download the modified JTop.jar from the following path.
http://rejeev.googlepages.com/JTop.jar
This will help us to identify the threads causing high CPU. Typically this will help us to resolve infinite loop issues.