JAVA Variables and Scope

JAVA Variables and Scope :

• JAVA Variables and Scope
• Java Contains three types of variables
  • Instance Variables
  • Static Variables
  • Local Variable
• Life span of static variables is till the JVM or application shuts down
• Life time of Instance variables is till the Object lives.
• The life span of local variable is till it reaches the end of the method.
• Instance variable and Static variables are initialized be default, where as Local Variables are not initialized.
• Local variables must be initializing before using it.
• Static variables must be declared in class general area.
• It must not be declared in constructor, blocks and methods.
• Local Variables have only one modifier, which is FINAL.