Java – Instance Methods

Instance Method:

• Defining a method without static keyword.
• We must invoke the method using object-reference.

No arguments and No return values method:

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

With arguments and No return values method:

class Code {             static void main(String[] args) {                         Code obj = new Code();                         obj.isEven(4);                         obj.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 and with return values method:

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

No arguments and with return values:

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