Monday, 4 January 2016

Java Tutorial : Java initializing fields


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https://www.youtube.com/watch?v=nxsvlb18kz4&list=UUhwKlOVR041tngjerWxVccw

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Java Tutorial : Java initializing fields
InitializeTest.java
public class InitializeTest
{
    // initialize to 10
    public int capacity = 10;

    // initialize to false
    private boolean flag = false;

    public InitializeTest()
    {

    }

    public static void main(String args[])
    {

        InitializeTest initializeTest = new InitializeTest();
        System.out.println("capacity : " + initializeTest.capacity);
        System.out.println("flag     : " + initializeTest.flag);

    }
}
Output
capacity : 10
flag     : false
InitializeConstructorTest.java
public class InitializeConstructorTest
{
    
    public int capacity;

    private boolean flag;

    /*
     * Instance variables can be initialized in constructors, where error
     * handling or other logic can be used
     */
    public InitializeConstructorTest(int capacity, boolean flag)
    {
        if(capacity > 200)
        {
            this.capacity = capacity;
        }
        else
        {
            this.capacity = 0;
        }
        this.flag = flag;
    }

    public static void main(String args[])
    {

        InitializeConstructorTest initializeConstructorTest = new InitializeConstructorTest(100, true);
        System.out.println("capacity : " + initializeConstructorTest.capacity);
        System.out.println("flag     : " + initializeConstructorTest.flag);
    }
}
Output
capacity : 0
flag     : true
Click the below link to download the code:
https://sites.google.com/site/javaee4321/java/InitializeDemoApp.zip?attredirects=0&d=1

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

Bitbucket Link:
https://bitbucket.org/ramram43210/java/src/41d9dfe14fcf9b8b617da7211fce54dcabe49f5c/BasicJava/InitializeDemoApp/?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
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