43 What is super keyword and usage of super keyword ?

Code:

class SuperClass
{
int a = 111;
static int b = 222;

static void m1()
{
System.out.println(" Super class static method ");
}
void m2()
{
System.out.println(" Super class non-static method ");
}
}

class SubClass extends SuperClass
{
int a = 333;  // Instance Variable
static int b = 444; // Class Variable

static void m1()
{
System.out.println(" Sub class static method ");
}
void m2()
{
int a = 555;  // Local Variable
System.out.println(" Sub class non-static method ");
System.out.println(" Local a: "+ a );
System.out.println(" Class a: "+ this.a );
System.out.println(" Super Class a: "+ super.a );
m1();
super.m1();
super.m2();
}
}

class Demo
{
public static void main( String args[] )
{
SubClass sc = new SubClass();
sc.m2();

}
}

Output:  

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