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Java to C# conversion (Vector class)

Posted on 2006-10-30
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Last Modified: 2008-01-16
Hello.

Having some problems converting this Java class, using Vector, so seeking some help porting it. The C# equivilent is supposedly ArrayList.

There are some items that I'm unsure about, for example:

The C# ArrayList:
Insert(int index, object value);

but the Java class is using:
insertElementAt(object value, int index);

Convert the class below and the points is yours. Please keep the same structure and names as the class has, eg. from the example above, "object value, int index" (java) and not "int index, object value" (C#).

public class ItemVector
{
    private Vector v;

    public ItemVector()
    {
        v = new Vector();
    }

    public void addElement(Item item)
    {
        if(item != null)
            v.addElement(item);
    }

    public Item elementAt(int i)
        throws Exception
    {
        return (Item)(Item)v.elementAt(i);
    }

    public void removeElementAt(int i)
        throws Exception
    {
        v.removeElementAt(i);
    }

    public void insertElementAt(Item item, int i)
        throws Exception
    {
        v.insertElementAt(item, i);
    }

    public void setElementAt(Item item, int i)
        throws Exception
    {
        v.setElementAt(item, i);
    }

    public boolean removeElement(Item item)
    {
        return v.removeElement(item);
    }

    public Item firstElement()
    {
        return (Item)v.firstElement();
    }

    public int size()
    {
        return v.size();
    }

    public void removeAllElements()
    {
        v.removeAllElements();
    }

    public boolean contains(Item item)
    {
        return v.contains(item);
    }
}

Thanks for reading!
0
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Question by:valvet
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2 Comments
 
LVL 8

Accepted Solution

by:
gena17 earned 2000 total points
ID: 17833776
It's probably should be something like this:

    public class ItemVector
    {
        private ArrayList v;

        public ItemVector()
        {
            v = new ArrayList();
        }

        public void addElement(Item item)
        {
            if (item != null)
                v.Add(item);
        }

        public Item elementAt(int i)
        {
            return (Item)v[i];
        }

        public void removeElementAt(int i)
        {
            v.RemoveAt(i);
        }

        public void insertElementAt(Item item, int i)
        {
            v.Insert(i, item);
        }

        public void setElementAt(Item item, int i)
        {
            v[i] = item;
        }

        public bool removeElement(Item item)
        {
            bool result = v.Contains(item);
            v.Remove(item);
            return result;
        }

        public Item firstElement()
        {
            return (Item)v[0];
        }

        public int size()
        {
            return v.Count;
        }

        public void removeAllElements()
        {
            v.Clear();
        }

        public bool contains(Item item)
        {
            return v.Contains(item);
        }
    }
0
 

Author Comment

by:valvet
ID: 17837709
I'll work from there, thank you.
0

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