Memory usage in Java

The articles in this section look at various aspects of memory usage in Java:

how to calculate the memory use of a Java object;
how to query the memory use of Java objects, taking advantage of the Java Instrumentation framework to ask the JVM for an object's usage, with a link to the Classmexer agent, which provides additional calls to make querying memory usage objects and their subobjects easier.
information on the memory usage of Strings and other objects that store character sequences, plus a look at how to reduce memory taken up by strings in Java.