Question

How can I delete object manually in Java? Is there any method like obj.delete() or obj.kill()

Answer 1

There is no real way. Java has a special Garbage Collector which does that for you. Once your object doesn’t have any references to it, it will be picked up by the Garbage Collector at some point and destroyed.

From Learning Java Tutorials:

The Garbage Collector

An object is eligible for garbage
collection when there are no more
references to that object. References
that are held in a variable are
usually dropped when the variable goes
out of scope. Or, you can explicitly
drop an object reference by setting
the variable to the special value
null. Remember that a program can have
multiple references to the same
object; all references to an object
must be dropped before the object is
eligible for garbage collection.