Is Java Case Sensitive Language?

No. Because of two simple reasons.

1)Identifiers in java is case insensitive.

Below two lines of code is absolutely compiles fine.

eg:int a=2;  //System.out.println(a); //2

int A=3; //System.out.println(A); //3

2) Literals for Hexadecimal,Octal in java is case sensitive

eg: int a=0x1; //System.out.println(a); //1

int A=0X1; // //System.out.println(A); //1