What is the purpose of inventing interface class and abstract class in Java though they have same purpose?

How to implement multi-threading using Java in single threaded Operating System (ie., on Operating System that does not support multi-threading)

Why does Java automatically do the "extends object" even if you don't declare it?

Why we are not using String as a primitive datatypes where we are using it as a Class? Explain this?

What is the difference between synchronization() & static Synchronization() in the thread?

What is the strictfp modifier for? How it isuseful?

Tool-tip text not visible when run applet in a browser in windows but it work on mac so plz provide any solution for this.

How to get bookmarks from firefox using java.I want to get bookmarks from firefox and store them into database.I want some sample code.

I am developing a project for video recording through Applet using JMF(Java Media Framework) package. I need to know if I can record video without JMF package using java?Or if I can include JMF package in my jar with all its dlls.

Hi All,

We r automating our buid process i wanted to know how to start the weblogic using command promptt or ant task to include in build xml.
Our server is on differdnt machine .......

Plz provide suggestion

It will be a great help for me

Thanks in advance

how to perform operation like sorting searching on records in a text file in java. record may contain stud name,marks etc

The central new idea in OOP is to allow classes to express similarities among objects that share some, but not all, of their structure and behavior. Such similarities can be expressed using inheritance and polymorphism. Explain how the special variables this and super help manage the inheritance relationship between classes and sub-classes. Do they (i.e., this and super) also help polymorphism? Explain....