what is difference between encapsulation and abstraction in java

How do we find the level of recursion from a recursive method. ie. How do we know the invocation level for a rwcursive method. if it is invoked first, the level is one, when it is invoked recursively for second time from within itself, the recursion level is 2 and so on.  

take a list of numbers from command line, sort them ascending and print

How to reverse a sentence in Java without losing meaningof words.  i.e.  I live in Santa Clara to Clara Santa in live I  

How many different types of collections are hidden inside a HashMap, also set specific subclasses of collections if possible. 

What is the difference between Comparator and Comparator interface.

How to sort a java.util.Set in Java?

What is the difference between java.util.Collection and java.util.List in Java.

Hi All, I want to put my all jsp files in /WEB-INF/jsf/ directory. But page is not navigated in faces-context.xml. And 404 error is shown.

What is difference betwen swing and awt package. And how swing is different from SWT.