What is heap size in Java?

Answer 1

Java heap is the heap size allocated to JVM applications which takes care of the new objects being created. If the objects being created exceed the heap size, it will throw an error saying memoryOutof Bound Java's default heap size limit is 128MB. If you need more than this, you should use the -Xms and -Xmx command line arguments when launching your program:

java -Xms -Xmx We can also give like in this format also.format is : -mx256m..Sometimes it will show error if you are using java -Xms -Xmx format..In that case use -mx256m this.value can be changed..

Answer 2

The default minimum memory allocated for heap storage in Java is dependent on the implementation.

The maximum size is theoretically unbounded, but I've never seen more than about 910 MB available, even on machines with far more free RAM.

Answer 3

In java when an object of array is created, memory is allocated to them from heap. The JVM through the use of new operator allocates memory from the heap for the object. The JVM has a deamon thread known as Garbage Collector whose task is to free those objects from heap whose reference is not alive in stack.

Answer 4

The heap is a section of memory controlled by a program used for dynamic variable allocation. Heap size is the size of that section of memory.

Answer 5

For 32 bit OS the default size is 64kb.

For 64 bit OS the default size is 128kb