Can you paste the code of  file MultiHashMapTest.java.?

// Add javadoc on ur own, test with ur test file, test file would have been helpful if you've pasted it here/, yata herne fursad nai choina, SB ma chat gardai masta, let me know how it goes, you know where to find me

import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.List;

import org.apache.commons.collections.MultiMap;

public class MultiHashMap extends HashMap implements MultiMap
{
    private static final long serialVersionUID = 1L;

    public Object getAll(Object key)
    {
        return super.get(key);
    }
    public void putAll(Object key, Collection values)
    {
         super.put(key, values);
    }

    public boolean contains(Object key, Object value)
    {
        List list = (ArrayList) super.get(key);
        if (list == null && list.size() < 1)
        {
            return false;
        }
        else
        {
            return list.contains(value);
        }
    }

    public Object get(Object key)
    {
        List list = (ArrayList) super.get(key);
        if(list == null)
        {
            return null;
        }
        else
        {
            return list.get(list.size() - 1);
        }
    }

    public String put(Object key, Object value)
    {
        List list =(ArrayList) super.get(key);
        if (list == null)
        {
            list = new ArrayList();
        }
        list.add(value);
        super.put(key, list);
        if (list.size() == 1)
        {
            return null;
        }
        else
        {
            return (String)list.get(list.size() - 2);
        }
     }

    public Object remove(Object key, Object item)
    {
        List list =(ArrayList) super.get(key);
        if (list == null && list.size() < 1)
        {
            return false;
        }
        else
        {
            return list.remove(item);

        }
    }
}

Answer to second.
import java.util.Comparator;

class NameComparator implements Comparator
{

    public int compare(Object ratNum1, Object ratNum2)
    {

        //parameter are of type Object, so we have to downcast it to Employee objects

        String ratNum1Val = ((RatNum)ratNum1).getValue();
        String ratNum2Val = ((RatNum)ratNum1).getValue();
        if(ratNum1Val > ratNum2Val)
            return 1;
        else if(ratNum1Val < ratNum2Val)
            return -1;
        else
            return 0;
    }

}

Not sure how yourRatNumSortingTest.java,

but you can sort using this class as below
Arrays.sort(arrayOfRatNumObjects, new RatNumComparator());

 

 

Please help me with this..Thank you in advance :)



In this lab, you are required to program with Swing and File I/O.

 

Your application will be a Graphical User Interface (GUI) that looks similar to these:

<!--[if !vml]--><!--[endif]--> <!--[if !vml]--><!--[endif]-->

 

This GUI contains several components:

<!--[if !supportLists]-->·      <!--[endif]-->a JTextArea component, in which you can type text or display content of a file.

<!--[if !supportLists]-->·      <!--[endif]-->a JMenuBar component, which contains two JMenu components

<!--[if !supportLists]-->1)    <!--[endif]-->a JMenu component which is labeled "File". This menu contains three items: "Open", "Save As" and "Exit".

<!--[if !supportLists]-->2)    <!--[endif]-->a JMenu component which is labeled "Style". This menu contains two sub-menus: the JMenu "font-type" and the JMenu "textAreaColor". The "font-type" menu contains three items: "Plain", "Bold" and "Italic". The "textAreaColor" menu contains two sub-menus: the JMenu "Foreground-Color" and the JMenu "Background-Color", each contains four items representing the color: “Pink”, “White”, “Blue” and “Black”.

 

You are required to achieve the following tasks with these components:

<!--[if !supportLists]-->(1)  <!--[endif]-->If you click “File”-> “Open”, you should be able to open a file window as below. You can open a file by either double clicking the file name or typing in the file name and hitting the “open” button, just as you normally do. The content of the file you selected should be shown in the text area. Only the content of a plain text file is required to be shown correctly. If the file doesn’t exist (double clicking the file name won’t has this problem, but if you type into the file name, it is possible), show a message box to indicate such an error. If you click “Cancel”, this window will be closed and nothing happens.

<!--[if !vml]--><!--[endif]-->

 

 

 

 

 

 

HINT: Design of this “open” window is NOT your job; it’s already done in the JFileChoose class. Go to http://java.sun.com/j2se/1.4.2/docs/api/ to check what functions and fields this class provides. What you need to do is figuring out which file has been selected and how to read its context into the text area. As to the message box, refer to the JOptionPane class.

<!--[if !supportLists]-->(2)           <!--[endif]-->If you click “File”-> “Save As”, you should be able to open a file window as below. After you double click a file name or type in a file name and click “Save”, the text currently shown in the text area should be saved in that file. You are NOT required to handle a double confirmation if the file has existed, so be careful that you may override some useful files (just be careful by yourself, this lab doesn’t require you to do anything about it). If you click “Cancel”, this window will be closed and nothing happens.

<!--[if !vml]--><!--[endif]-->

 

 

 

 

 

 

 

 

HINT: Same as task (1), this window is also manipulated by the JFileChoose class.

<!--[if !supportLists]-->(3)           <!--[endif]-->If you click “File”-> “Exit”, your text editor window will be closed and the program stops.

<!--[if !supportLists]-->(4)           <!--[endif]-->You should be able to change the font style, the foreground color and the background color of the text area.

Java_help

Your 60% solution is in my thread.
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Thanks Ayush...much appreciated!

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