clipped from: visualvm.dev.java.net   
VisualVM is a visual tool integrating several commandline JDK tools and lightweight profiling capabilities. Designed for both production and development time use, it further enhances the capability of monitoring and performance analysis for the Java SE platform. See screenshots.

VisualVM Is Designed For You


Application Developer: Monitor, profile, take thread dumps, browse heap dumps

System Administrator: Monitor and control Java applications across the entire network

Java Application User: Create bug reports containing all the necessary information