What is the purpose of Garbage Collection in Java, and when is it used?
Câu trả lời What is the purpose of Garbage Collection in Java, and when is it used?
Garbage Collection (GC) in Java serves the primary purpose of managing memory automatically by reclaiming memory that is occupied by objects that are no longer in use or needed by the application. This process helps prevent memory leaks, which can lead to reduced performance or cause the application to run out of memory, potentially leading to a crash[1][2][3][4][5][6][7][8][9][10][11][12].
Purpose of Garbage Collection
The main objectives of garbage collection in Java include:
Memory Management: Automatically freeing up memory that is no longer needed, which helps in maintaining optimal performance and avoiding the manual deallocation of memory, thus reducing the programmer's workload and minimizing the risk of errors[1][2][3][4][5][6][7][8][9][10][11][12].
Performance Optimization: By automatically removing unused objects, garbage collection helps in optimizing the memory resources, which can lead to better application performance[1][2][3][4][5][6][7][8][9][10][11][12].
System Stability: Prevents memory leaks by deallocating objects that are no longer in use, which ensures that the application does not consume more memory than it requires and remains stable over time[1][2][3][4][5][6][7][8][9][10][11][12].
When is Garbage Collection Used?
Garbage collection in Java is triggered automatically by the Java Virtual Machine (JVM) under several circumstances:
Heap Memory Threshold: Garbage collection typically occurs when the amount of free memory in the JVM heap falls below a certain threshold. This is to ensure that there is enough memory available for new objects without slowing down the program[1][2][3][4][5][6][7][8][9][10][11][12].
