Default Initial Values in java

Thu Jan 29, 2009 10:10 pm

Default Initial Values in java :
If you declared class's variables without initialization they we take the default Initial Values base of different data types
java code

class myClass
{
   private short shortVar;
   private int intVar;
   private long longVar;
   private float floatVar;
   private double doubleVar;
   private boolean booleanVar;
   

}

- boolean data type:

Code:: boolean false

- byte data type:

Code:: byte 0

- short data type:

Code:: short 0

- char data type:

Code:: char `\u0000`

- integer data type:

Code:: int 0

- float data type:

Code:: float 0.0f

- double data type:

Code:: double 0.0d

- long datatype :

Code:: long oL

As you see in class declaration you don't have to set the initial values but if you are declaring local variables within functions you must set it :
java code

public void display()
   {
       int x;
       System.out.println(x);
   }

This code has an compile because variable (x) is not initialized.

Default Initial Values in java

Default Initial Values in java

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