I want to control database connections in my program and want that only one thread should be able to make database connection at a time. How can I implement this logic?
What is the purpose of assert keyword used in jdk1.4.x?
How to count occurrences of each duplicate element in a list {a,b,d,c,a,b} ? Thanks in Advance
public class Garbage { int a=0; public void add() { int c=10+20; System.out.println(c); System.out.println(a); } public static void main(String args[]) { Garbage obj=new Garbage(); System.gc(); System.out.println("Garbage Collected"); obj.add(); } } Above is a code in java used for garbage collection. object obj has been created for the class Garbage and system.gc method is called. Then using that object add method is called.System.gc method if called the obj should be garbage collected?
What is a file pointer?
Can we override the main method?
How do you use final keywords and final variables in Java?
Is it compulsory to have atleast one abstract method in abstract class?
Can an interface be defined inside a class?
What Is Pointer?
diff between abstract methods and interfaces with programing (code) example?
How do I get a substring?
What is tree node in java?