如何使用JProfiler查找java中的内存泄漏?

How to find memory leak in java using JProfiler? I have been working in JProfiler for the past 1 week to find memory leak in a web application. I read some manuals and see some articles, it says see the memory usage in all objects and allocated objects views and using the allocation hot spot you can find the memory leak. I looked into it and found lot of memory used by char, string, bytes. Since i am a fresher i don't know how to figure this and solve the memory leak. Please help me over this ..How to find memory leak in java using JProfiler