Methods Introduction

In java, functions are treated as methods. Other programming languages like C functions are basically a block of statements. Functions are designed to getting same work done by calling it each time.

Why does we used methods in java?

Reusable code – method are basically a block of statements. When we calling a method, then we also calls that statements which defines under method (function).
Less space – when we calling any method, then that method does the same job each and every time whatever statements declares within that method. So technically it takes less space in program.
Save time – time matters for every programmer and developers. Using a method it saves a lot of time.

Let’s discuss about method declaration and calling it…

Creating a method

Let’s assume we have create a class called ‘main’. We can create any method inside ‘main’ class.

Creating a method

class main{

staticvoid method1(){// statements}

}

From the above code example, you see we create a method ‘method1’.

But here you need to familiar with some keywords used in upper code.

static – it means ‘method1’ method belongs to main class.
void – ‘method1’ method does not have any return type.
main – this is base class for now. ‘main’ method class name and java file name should be same.

Calling a method

We calls any method inside ‘main’ method. For calling a method, we need to declare by its name and followed by pair of parenthesis.

class main{
static void method1(){ // statements }
public static void main(String[] args) {
/* called method -> method1()
Calling method -> ‘main’
*/
method1();
}
}

Let’s see some coding example…

public class code1 {
    // defining func1() method
    static void func1(){
System.out.println(“simple method!!”);
    }
    public static void main(String[] args) {
        // calls func1() method
        func1();
    }
}

output

Remember: we call any method ‘n’ number of times.

Let’s see another code below…

public class code2 {
    public static void main(String[] args) {
      // calling msg() nethod 3 times.
msg();
msg();
msg();
    }
    static void msg(){
System.out.println(“welcome to microcodes.in”);
System.out.println(“this is shimanta das.”);
    }
}

output

download notes

download code.zip