Java – Static Methods

Method:

• A block of instructions having identity.
• Methods takes input(parameters), process input and return output.
• Methods are used to perform operations on data

Syntax	Example
returntype identity(arguments) {             statements; }	int add(int a, int b) {             int c=a+b;             return c; }

Classification of Methods: Based on taking input and returning output, methods are classified into 4 types.

Method Definition: Method definition consists logic to perform the task. It is a block.

Method Call: Method Call is used to invoke the method logic. It is a single statement.

No arguments and No return values method:

class Code {             public static void main(String[] args) {                         Code.fun();             }             static void fun(){                         System.out.println(“fun”);             } }

With arguments and No return values:

class Code {             static void main(String[] args) {                         Code.isEven(4);                         Code.isEven(13);             }             static void isEven(int n){                         if(n%2==0)                                     S.o.p(n+” is Even”);                         else                                     S.o.p(n+” is Not even”);             } }

With arguments with return values:

class Code {             static void main(String[] args) {                         int r1 = Code.add(10, 20);                         S.o.p(r1);             }             static int add(int a, int b){                         return a+b;             } }

No arguments and with return values:

class Code {             static void main(String[] args) {                         double PI = Code.getPI();                         S.o.p(“PI val : ” + PI);             }             static double getPI(){                         double PI = 3.142;                         return PI;             } }