What is interface and abstract class.
What is interface and abstract class.
All Posts in "core java"
What is dead lock.
What is dead lock.
What is synchronized block ,static block .
What is synchronized block ,static block .
How hash map works internally.
How hash map works internally.
Difference between hashmap and hash table and concurrent hashmap.
Difference between hashmap and hash table and concurrent hashmap.
Difference between arraylist and vector.
Difference between arraylist and vector.
Can a constructor in Java be private or final?
73 down vote Yes, a constructor can be private. There are different uses of this.…
how do you enforce garbage selection?
Under the documentation for OutOfMemoryError it declares that it will not be thrown unless the…
difference between synchronized hashmap and concurrent hashmap?
ConcurrentHashMap. It allows concurrent modification of the Map from several threads without the need to…
how do you avoid creating a new instance while deserializing an object?
Here is my code which serializes, and deserializes. FileOutputStream fos = new FileOutputStream(“myserial1.txt”); ObjectOutputStream oos…
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