this() vs super() in java

// Java code to illustrate usage of this() 
  
class RR { 
    RR() 
    { 
        this(10); 
        System.out.println("Flow comes back from " +  
                           "RR class's 1 arg const"); 
    } 
  
    RR(int a) 
    { 
        System.out.println("RR class's 1 arg const"); 
    } 
    public static void main(String[] args) 
    { 
        new RR(); 
        System.out.println("Inside Main"); 
    } 
}