Variables

Static/class Variables

Single instance which is shared by all the classes. Sort of a global variable bound to the class where it is defined.

Try to use them as final, which makes them into constants.

public class SomeClass {

   public static final String constantValue = "Some text";

}

Instance Variables

Each instance of the class will have their own copy of the variable.

public class SomeClass {

   private String value = "some value";

}

Local Variables

Declared inside methods:

public final void someMethod() {
   final String value = "some value";
}

Parameters

Received by methods:

public final void someMethod(final String value)

More Information

• Java Variables