Tuesday, 16 May 2017

Java Tutorial: Generics in java | Java Generics [How to define a Generic method - printArray]


Click here to watch in Youtube : 
https://www.youtube.com/watch?v=D0R7fhXjpLo&list=UUhwKlOVR041tngjerWxVccw

GenericDemo.java
/*
 * Like generic class, we can create generic method that can accept any type
 * of argument. 
 * 
 * Let’s see a simple example of java generic method to print
 * array elements. We are using here E to denote the element.
 */
public class GenericDemo
{
    public static void main(String[] args)
    {
        Integer[] intArray =
        { 100, 200, 300, 400, 500 };
        
        System.out.println("Printing Integer Array");
        printArray(intArray);

        Character[] charArray =
        { 'J', 'A', 'V', 'A' };

        System.out.println("Printing Character Array");
        printArray(charArray);
    }

    public static <E> void printArray(E[] elements)
    {
        for (E element : elements)
        {
            System.out.println(element);
        }
        System.out.println();
    }
}
Output
Printing Integer Array
100
200
300
400
500

Printing Character Array
J
A
V
A
Click the below link to download the code:
https://sites.google.com/site/ramj2eev1/home/javabasics/GenericMethodDemo_App.zip?attredirects=0&d=1

Github Link:
https://github.com/ramram43210/Java/tree/master/BasicJava/GenericMethodDemo_App

Bitbucket Link:
https://bitbucket.org/ramram43210/java/src/539015917c8406e4be671410d713073b3971d1a5/BasicJava/GenericMethodDemo_App/?at=master

See also:
  • All JavaEE Viedos Playlist
  • All JavaEE Viedos
  • All JAVA EE Links
  • Servlets Tutorial
  • All Design Patterns Links
  • JDBC Tutorial
  • Java Collection Framework Tutorial
  • JAVA Tutorial
  • Kids Tutorial
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