When an object is no longer referred to by any variable, java automatically reclaims memory used by that object. This is known as garbage collection. System. gc() method may be used to call it explicitly.

In Java, garbage collection is a process by which the Java Virtual Machine (JVM) automatically manages memory by reclaiming the memory occupied by objects that are no longer reachable or in use by the program. The garbage collector identifies and removes objects that are no longer referenced, freeing up memory and preventing memory leaks.

In Java, you do not explicitly call the garbage collector. The JVM automatically handles garbage collection. However, you can suggest to the JVM that it’s a good time to run the garbage collector using System.gc() or Runtime.getRuntime().gc(). Keep in mind that there is no guarantee that the garbage collector will run immediately after calling these methods, as it ultimately depends on the JVM’s implementation.

It’s generally recommended to let the JVM handle garbage collection automatically, as it is designed to efficiently manage memory on its own. Explicitly calling the garbage collector is usually unnecessary and can have performance implications.