Methods in Java

Defining a method in Java

 

Methods are considered as behavior in a Java Program.

Any changes to variables or any other objects in class are done using methods.

Structure of a method.

 

access-specifier return-type method-name(parameters)

{

}

 

Simple example of a method:

 

public void sayHello()

{

System.out.println(“Hello Tom !!”);

}

 

A method can have one or more parameters.

Example consider a method to add two numbers

 

public void add(int num1,int num2)

{

int sum=num1+num2;

}

 

A method with return type void means that the method will not return anything, but if a method requires to return back something it will have return type other than void.

And a point to remember here is that it will require to include a return statement at the end of the method.

Or in simple words. IF A METHOD RETURN SOMETHING, LAST STATEMENT IN THE METHOD WILL be the return statement.

 

Example of a method with return statement

public int square(int num)

{

int i=num*num;

return i;

}

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[Source : http://www.javawithz.in/2013/10/methods.html ]

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