Run-time memory management

At execution time, the Java virtual machine (JVM) must handle different parts of memory:

• the part that contains the Java bytecode (i.e., the code that is executed by the JVM) -
  • determined at execution time when the class is loaded into the JVM
  • the dimension is fixed for each method at compilation time
• heap: part of memory that contains the objects -
  • dynamically grows and shrinks during execution
  • each object is allocated and deallocated independently from the other objects
• stack of activation records: part of memory for the data local to methods (variables and parameters) -
  • dynamically grows and shrinks during execution
  • is managed in the form of a stack (Last-In-First-Out strategy)