Hi You don't have to do any memeory management in java. Whenever you want to allocate memory for any object use new keyword to do that. However, there is no corresponding delete keyword to release that memory on your own. Garbage Collector takes care of everything in java. When JVM runs low in memory it starts garbage collector which releases all unreferenced memory. However, if you want to run garbage collector on your own then you have to call one of the following method Runtime.getRuntime().gc () or System.gc()
But note that garbage collector is a costly process and it may affect you program performance if you call gc() very often. So it is suggested to leave the task of memeory management on JVM.