How to create two constructor of same class and act on value pass in second time

Question

here is my attempt

public class blah {

HashSet<something> blah;    

public Blah() {
    this.blah = new HashSet<something>(); //this is empty constructor of something

}

// I want to copy all the element of Public blah in new Blah

public Blah(Blah initialBlah) {
    initialBlah = new Blah();
            // MAKE DEEP COPIES HERE 
            for (something c : blah){
                initialBlah.add(c);
            }

        }

I tried that but is not right HashSet newBlah = new HashSet();

tried to read the [previous question](http://stackoverflow.com/questions/64036/how-do-you-make-a-deep-copy-of-an-object-in-java)? you will need that to copy the `HashSet` contents as.. so far, you're just copying the references.. — Bagus Tesa, Apr 05 '17 at 01:55
How do I copy a content of initial hashset in a new hashset that is not same as first hashset in the memory — Reboot, Apr 05 '17 at 01:59

score 0 · Answer 1 · answered Apr 05 '17 at 02:03

0

You are just copying the references. You need to copy the content fully to create a new Blah object. To achieve this, do this instead of your for loop

this.blah = new HashSet<something>(initblah.blah);

answered Apr 05 '17 at 02:03

toro

194
5

thanks, I have another question regarding hashsets. if we have Class A(String A, String B, int C) now I have a new Class makes a empty hashset of A Class D(){ HashSet d = new HashSet (); } then Class D(D initD){ this constructor is my problem } – Reboot Apr 05 '17 at 02:43

How to create two constructor of same class and act on value pass in second time

1 Answers1