JAVA TUTORIALS FOR BEGINNER: method

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Java
 static method program: static methods in Java can be called without 
creating an object of class. Have you noticed why we write static 
keyword when defining main it's because program execution begins from 
main and no object has been created yet. Consider the example below to 
improve your understanding of static methods.

<h2>
Java static method example program</h2>
<div class="geshifilter">
<pre class="java geshifilter-java" style="font-family: monospace;">class Languages {
 public static void main(String[] args) {
 display();
 }
 
 static void display() {
 System.out.println("Java is my favorite programming language.");
 }
}</pre>
<pre class="java geshifilter-java" style="font-family: monospace;"> </pre>
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Output 
 
<img alt="Java static method program" src="http://www.programmingsimplified.com/images/java/java-static-method-program.png" /> 
 
<h2>
Java static method vs instance method</h2>
Instance method requires an object of its class to be created before 
it can be called while static method doesn't require object creation.

<div class="geshifilter">
<pre class="java geshifilter-java" style="font-family: monospace;">class Difference {
 
 public static void main(String[] args) {
 display(); //calling without object
 Difference t = new Difference();
 t.show(); //calling using object
 }
 
 static void display() {
 System.out.println("Programming is amazing.");
 }
 
 void show(){
 System.out.println("Java is awesome.");
 }
}</pre>
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Output 
 
<img alt="Static vs instance method program" src="http://www.programmingsimplified.com/images/java/static-method-vs-non-static-method.png" /> 
 
<h3>
Using static method of another classes</h3>
If you wish to call static method of another class then you have to 
write class name while calling static method as shown in example below.

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<pre class="java geshifilter-java" style="font-family: monospace;">import java.lang.Math;
 
class Another {
 public static void main(String[] args) {
 int result;
 
 result = Math.min(10, 20); //calling static method min by writing class name
 
 System.out.println(result);
 System.out.println(Math.max(100, 200));
 }
}</pre>
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Output

<div class="geshifilter">
<pre class="java geshifilter-java" style="font-family: monospace;">10
200</pre>
</div>
Here we are using min and max methods of Math class, min returns 
minimum of two integers and max returns maximum of two integers. 
Following will produce an error:

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<pre class="java geshifilter-java" style="font-family: monospace;">min();</pre>
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We need to write class name because many classes may have a method with same name which we are calling.

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Java static method

Java static method program: static methods in Java can be called without creating an object of class....

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Java static method