Do we need complier for java....How and where can we create a java program...and how can we run it...

Answer 1

just the Jdk : http://www.oracle.com/technetwork/java/javase/downloads/index.html

and a text editor or an Ide like netbeans ,eclipse ,intellij idea , bluej , etc.

Answer 2

you do not need any specific program to work with Java. just install java jdk, wrote program in some text editor and compile it with command javac in command prompt.
or you can use some of special software like NetBeans, blueJ or something similar.
i hope that i helped you.