How can we avoid including a header more than once?
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why using interface interface ?
What is the meaning of find and replace?
What is meant by polymorphism?
What is identifier with example?
import java.io.*; class Demo { public static void main(String args[]) { File f=new File("1234.msg"); String arr[]=f.list(); System.out.println(arr.length); } }
How many java versions are there?
What is the difference between state-based unit testing and interaction-based unit testing?
What is keyword in oop?
What is a modifier?
In the HashMap, we know the values but we dont know the key, then how can we get the key from HashMap ?????
What is unicode datatype?
How many types of exception can occur in a java program?