9. Memory Management and Garbage Collection
Efficient memory management in Java is facilitated by automatic garbage collection, which reduces manual memory handling complexities. The chapter details Java's memory model, object allocation, various garbage collection methods, and practices to optimize memory usage. It emphasizes the balance between efficient memory allocation and deallocation, ensuring robust and scalable applications.
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What we have learnt
- Memory management in Java is primarily handled through its garbage collection mechanism.
- Understanding the different memory regions such as heap, stack, and method areas is crucial for efficient Java programming.
- Garbage collectors in Java, including Serial, Parallel, G1, and ZGC, are designed to enhance performance and minimize memory leaks.
Key Concepts
- -- Garbage Collection (GC)
- The process of automatically identifying and reclaiming memory occupied by objects that are no longer reachable.
- -- Heap
- The memory area where Java objects are allocated at runtime.
- -- Stack
- The memory area where method calls and local variables are stored, unique to each thread.
- -- Mark and Sweep Algorithm
- A two-phase garbage collection algorithm that marks reachable objects and sweeps away unreachable ones.
- -- Memory Leak
- A situation where memory that is no longer needed is not released, potentially leading to performance degradation.
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