Jwebap is an profiler tool for j2ee application with jdk 1.4 and up.You can use it to monitor method,jdbc,jsp executions etc.And then view in a web console.It can be used not only in test environment but production environment with very low-overhead.
JAllocRate is a JVMPI (Java 1.4+) profiler that collects various memory statistics about a Java program while it runs. Its key function is to measure allocation rate over a specified interval, which sets it apart from other memory profilers.
JTombstone is a program for finding dead code in your Java programs. It reports on dead code at the method level, by processing Java class files. No source code is needed to use it. JTombstone is a Java program and requires JDK 1.4 or later.