Answer 1

Java (as of Java 5) now has a standard JMX bean that can be used to receive low memory notification. See java.lang.management.MemoryMXBean.

Answered by: Daryl707 | Posted: 22-02-2022

Answer 2

I suggest that a better question is "Why is my application running out of memory?"

You may need to increase the memory available to the JVM at startup; You may have a memory leak (objects that aren't getting released when they're no longer needed.)

More information on the application might also be helpful

• Does it run continuously, 24x7x365?
• Does it run once and exit?

Using performance monitoring/profiling tools to find the cause of the memory problem is really your best bet.

Answered by: Leonardo109 | Posted: 22-02-2022

Answer 3

Have a look at the freeMemory method of Runtime (see http://java.sun.com/javase/6/docs/api/java/lang/Runtime.html for details)

In short: do

Runtime.getRuntime().freeMemory()

Answered by: Lucas131 | Posted: 22-02-2022

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