CODEWITHSUNDEEP
javac++struct
neteot
neteot

Reputation: 933

Array struct in java

I am learning Java and I am doing some C++ codes into java, I am following this webpage http://uva.onlinejudge.org and trying to do some of the problems in Java. Now I am doing this problem http://uva.onlinejudge.org/index.phpoption=com_onlinejudge&Itemid=8&page=show_problem&problem=1072 and after researching and figure out how to do it on paper I found this webpage where the problems seems easy to follow: http://tausiq.wordpress.com/2010/04/26/uva-10131/

But now, and due to the fact I am new on Java, I want to learn how to do an array of struct in Java. I now I can do a class like a struct: if this is in C++

struct elephant {
    int weight;
    int iq;
    int index;
} a [1000 + 10];

I can do this in Java: 

public class Elephant {
        private int _weight;
        private int _iq;
        private int _index;

        public Elephant(int weight, int iq, int index) {
            this._weight = weight;
            this._iq = iq;
            this._index = index;
        }

        public int getWeight() {
            return this._weight;
        }

        public int getIQ() {
            return this._iq;
        }

        public int getIndex() {
            return this._index;
        }

        public void setWeigth(int w) {
            this._weight = w;
        }

        public void setIQ(int iq) {
            this._iq = iq;
        }

        public void setIndex(int i) {
            this._iq = i;
        }
    }

But I don't know how I can turn this into the last part of the struct in c++: 

a [1000 + 10];

I mean, having an array of a objects of the class Elephant in Java like having an array of elements elephants in c++

Could someone help me to understand it better..

Upvotes: 1

Views: 8121

Answers (2)

Chris Thompson
Chris Thompson

Reputation: 35598

Arrays of objects in Java are accomplished the same way as an array of primitives. The syntax for this would be 

Elephant[] elephants = new Elephant[1000+10];

This will initialize the array, but it will not initialize the elements. Any index into the array will return null until you do something like:

elephants[0] = new Elephant();

Upvotes: 5

Jens
Jens

Reputation: 69440

This should be what you are loking for :

Elephant []  array = new Elephant[1010];

Upvotes: 1

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