Question

Show how a class and a method are defined, how the method is called, and how it can return a value.  Remember that you need to create an object of the class before you can call its methods. You should create your class and call its method in another class that has a main method.

Answer 1

import java.util.*;

class DemoClass
{ //definition of class

void method1() //definition of method
{
System.out.println("A method doesn't return anything!!"); //called method displays a message
}

int function1(int a) //definition of a function  
{
return a; //called function return a value

  //function does return value
}
}

class TestClass
{
public static void main(String args[])
{
DemoClass dc=new DemoClass(); //Instantiation of a class (a creating of an object)
dc.method1(); //calling the method
System.out.println("function does return value ,value is "+dc.function1(100)); //calling the function
}
}