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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.



_________________
M. S. Rakha, Ph.D.
Queen's University
Canada


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