Java / JDK, JRE, JVM, JIT
What is Heap space in Java?
Java Virtual Machine(JVM) gets some memory from the underlying operating system to run any java program. This memory is referred as Java heap.
Heap in Java located at bottom of address space and move upwards. When an object is created using new operator or by any other means object is allocated memory from Heap and when the object is garbage collected, memory goes back to Heap space in Java and get reused.
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