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Explanation

Garbage Collection is the automatic memory
management process that removes unused objects.

Code:

String str = new String("Hello");
str = null; // Eligible for GC

Explanation

System.gc() is used to request JVM to
perform garbage collection.

Code:

System.gc();

Explanation

An object becomes eligible for garbage
collection when it has no references.

Code:

Object obj = new Object();
obj = null;

Explanation

finalize() method was used to perform
cleanup before GC
(deprecated in modern Java).

Code:

@Override
protected void finalize() throws Throwable {
    System.out.println("Object collected");
}

Explanation

JVM manages heap memory and garbage
collection automatically.

Code: