Java Programming/Keywords/super

super is a keyword.

• It is used inside a sub-class method definition to call a method defined in the super class. Private methods of the super-class can not be called. Only public and protected methods can be called by the super keyword.
• It is also used by class constructors to invoke constructurs of its parent class.

Syntax:

super.<method-name>();

For example:

public class SuperClass  {     public void printHello()     {        System.out.println( <code><font style="color:DarkGreen; text-decoration: none; font-weight: bold;">&quot;Hello from SuperClass&quot;</font></code> );       return;     }  }  //...  public class SubClass extends SuperClass  {     public void printHello()     {        super.printHello();        System.out.println( <code><font style="color:DarkGreen; text-decoration: none; font-weight: bold;">&quot;Hello from SubClass&quot;</font></code> );       return;     }       public static main( String[] args )     {        SubClass obj = new SubClass();        obj.printHello();     }  }

Running the above program:

Java SubClass

The output:

"Hello from SuperClass"
"Hello from SubClass"

See also:

• Java Programming/Keywords/extends

In Java 1.5 and later, the "super" keyword is also used to specify a lower bound on a wildcard type parameter in Generics.

public void sort(Comparator<? super T> comp) { ... }