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x1xsup3rm4nx1x · Guest

Ok, i finally think i got my assignment done, but i keep getting an error
saying i need a return statement. I dont think i need to put one 3 times
in a method, so if anyone can help me find the solution, i would really
appreciate it.

This is just for reference, here is my ListTest file that was given for
the assignment.

____________________________________________________________
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;

import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;

import javax.swing.JButton;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;
/*
* Created on Jul 14, 2004
*
* Tests phone entry list and perform incremental search on the list
* Press ESC key to quit the program
*
* @author Prabu
*
* Asg4
*/

public class ListTest extends JPanel
implements KeyListener,
ActionListener
{
static JFrame frame;
JTextArea displayArea;
JTextField typingArea;
JButton button;
String keyString = "";
static List phoneList;
boolean eraseInput = true;

static final String newline = "n";

public ListTest()
{
super(new BorderLayout());

button = new JButton("Clear");
button.addActionListener(this);

typingArea = new JTextField(20);
typingArea.addKeyListener(this);

displayArea = new JTextArea();
displayArea.setEditable(false);
JScrollPane scrollPane = new JScrollPane(displayArea);
scrollPane.setPreferredSize(new Dimension(375, 125));

add(typingArea, BorderLayout.PAGE_START);
add(scrollPane, BorderLayout.CENTER);
add(button, BorderLayout.PAGE_END);
}

/** Handle the button click. */
public void actionPerformed(ActionEvent e)
{
//Clear the text components.
typingArea.setText("");

//Return the focus to the typing area.
typingArea.requestFocusInWindow();
}

/** Handle the key typed event from the text field. */
public void keyTyped(KeyEvent e)
{
displayInfo(e, "KEY TYPED: ");
}

/** Handle the key pressed event from the text field. */
public void keyPressed(KeyEvent e)
{
//displayInfo(e, "KEY PRESSED: ");
}

/** Handle the key released event from the text field. */
public void keyReleased(KeyEvent e)
{
//displayInfo(e, "KEY RELEASED: ");
}

protected void displayInfo(KeyEvent e, String s)
{
//You should only rely on the key char if the event
//is a key typed event.
int id = e.getID();
if (id == KeyEvent.KEY_TYPED)
{
char c = e.getKeyChar();
if (c == 'u001B') // when ESC key is pressed
{
frame.dispose(); // close the frame (window)
}
keyString += c;
int matches = phoneList.matchCount(keyString);
if (matches <= 1)
{
String outputString;
if (matches == 1)
{// unique match
Entry entity = phoneList.getEntry(keyString);
if (entity != null)
{
outputString = entity.getName() + " " + entity.getPhoneNumber();
}
else
{
outputString = "Error in Array List content";
}
}
else
{
outputString = "No match is found";
}
displayArea.append(newline + outputString + newline);
displayArea.setCaretPosition(displayArea.getDocument().getLength());
button.doClick();
keyString = "";
eraseInput = true;
}
else
{ // no. of matches is more than one -- accept additional character
if (eraseInput)
{ // erase the last character of the previous input string
eraseInput = false;
button.doClick();
}
}
}
}

/**
* Create the GUI and show it.
*/
private static void createAndShowGUI()
{
//Make sure we have nice window decorations.
JFrame.setDefaultLookAndFeelDecorated(true);

//Create and set up the window.
frame = new JFrame("Incremental List Search [press ESC to quit]");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

//Create and set up the content pane.
JComponent newContentPane = new ListTest();
newContentPane.setOpaque(true); //content panes must be opaque
frame.setContentPane(newContentPane);

//Display the window.
frame.pack();
frame.setVisible(true);
}

public static void main(String[] args) throws IOException
{
phoneList = new List();
loadEntries("phone.txt", phoneList);
displayEntries(phoneList); // for debugging purpose

System.out.println("Phone list search...");

//Schedule a job for the event-dispatching thread:
//creating and showing this application's GUI.
javax.swing.SwingUtilities.invokeLater(new Runnable()
{
public void run()
{
createAndShowGUI();
}
});
}

public static void loadEntries(String fileName, List phList) throws
IOException
{
BufferedReader inpFile = new BufferedReader(new FileReader(fileName));

String lineText, keyValue, phoneNr;
int entryCount = 0;

/*
* Assume that each entry is stores as a single line on the file
* The first value contains the entry name
* The next value corresponds to the associated phone number
* There is no blank line in the file
*/
while ((lineText = inpFile.readLine()) != null )
{
String values[] = lineText.split(" ");
keyValue = values[0];
phoneNr = values[1];
Entry phEntry = new Entry(keyValue, phoneNr);
phList.add(phEntry);
entryCount++;
}
inpFile.close();
System.out.println("No. of entries read = " + entryCount);
}

public static void displayEntries(List phList) throws IOException
{
System.out.println("nLoaded phone list entries:");

for (int i= 0; i < phList.getSize(); i++ )
{
Entry ph = phList.getEntry(i);
if (ph != null)
System.out.println(ph.getName() + " " + ph.getPhoneNumber());
}
System.out.println();
}

}
____________________________________________________________

ok, here is my Entry.java file, i think im finished with this, and it
compiles with no errors.

____________________________________________________________

public class Entry
{
public static String phone;
public static String name;
public static boolean namePre;
public static int c;

public Entry(String a, String b)
{
name = a;
phone = b;
}

public boolean namePrefix(String c)
{

for(int i = 1; i < getName().length(); i++)
{
if(getName().substring(1,i).equalsIgnoreCase(c))
{
return true;
}

return false;
}
return true;
}

public String getName()
{
return name;
}
public String getPhoneNumber()
{
return phone;
}

}
____________________________________________________________

Now this is what i need help on, it is my List.java file, i keep getting a
missing return statement error when i compile, i think i have messed up
somewhere, but im not sure where. The error keeps comming up in the last 2
methods, the Entry getEntry(String...) and the Entry getEntry(int). If
someone could help me and tell me what im doing wrong, or tell me how to
fix it, i would appreciate it.
____________________________________________________________

import java.util.ArrayList;

public class List
{
private ArrayList numbers;

public List()
{
numbers = new ArrayList();
}

public void add(Entry a)
{
numbers.add(a);
}
public int matchCount(String b)
{
int matches = 0;
int z = 0;
for (int i = 0; i < numbers.size(); i++)
{
Entry ok = (Entry)numbers.get(i);
if(ok.getName().substring(z, z+1).equalsIgnoreCase(b))
{
matches++;
}

return matches;
}

}
public int getSize()
{
return numbers.size();
}
public Entry getEntry(String c)
{
int z = 0;
for (int i = 0; i < numbers.size(); i++)
{
Entry ok = (Entry)numbers.get(i);
if (ok.getName().substring(z, z+1).equalsIgnoreCase(c))
{
z = 0;
return ok;
}

}
}

public Entry getEntry(int d)
{
for(int i = 0; i < numbers.size(); i++)
{
Entry ok2 = (Entry)numbers.get(d);
return ok2;
}

}

}

Andrew Thompson · Guest

On Tue, 20 Jul 2004 15:39:54 -0400, x1xsup3rm4nx1x wrote:

Bryce · Guest

On Tue, 20 Jul 2004 15:39:54 -0400, "x1xsup3rm4nx1x"
<x1xsup3rm4nx1x (AT) hotmail (DOT) com> wrote:

Roedy Green · Guest

On Tue, 20 Jul 2004 15:39:54 -0400, "x1xsup3rm4nx1x"
<x1xsup3rm4nx1x (AT) hotmail (DOT) com> wrote or quoted :

Roedy Green · Guest

On Tue, 20 Jul 2004 15:39:54 -0400, "x1xsup3rm4nx1x"
<x1xsup3rm4nx1x (AT) hotmail (DOT) com> wrote or quoted :

x1xsup3rm4nx1x · Guest

I fixed it where it would compile the program, but when you run the
listTest.java file, it only loads the last name on the phone list that it
takes. Im not sure why, but it loads the name 5 times, instead of 5
different names. Can anyone help me with why it loads that way?

here is my updated files

Entry. java

public class Entry
{
public static String phone;
public static String name;
public static boolean namePre;
public static int c;

public Entry(String a, String b)
{
name = a;
phone = b;
}

public boolean namePrefix(String c)
{

for(int i = 1; i < getName().length(); i++)
{
if(getName().substring(1,i).equalsIgnoreCase(c))
{
return true;
}

return false;
}
return true;
}

public String getName()
{
return name;
}
public String getPhoneNumber()
{
return phone;
}
}

and

List.java

import java.util.ArrayList;

public class List
{
private ArrayList numbers;

public List()
{
numbers = new ArrayList();
}

public void add(Entry a)
{
numbers.add(a);

}
public int matchCount(String b)
{
int matches = 0;
int x = 0;
for (int i = 0; i < numbers.size(); i++)
{
Entry ok = (Entry)numbers.get(i);
if(ok.getName().substring(x, x+1).equalsIgnoreCase(b))
{
matches++;
}

return matches;
}

return 0;
}
public int getSize()
{
return numbers.size();
}
public Entry getEntry(String c)
{
int z = 0;
for (int i = 0; i < numbers.size(); i++)
{
Entry ok = (Entry)numbers.get(i);
if (ok.getName().substring(z, z+1).equalsIgnoreCase(c))
{
return ok;
}
else return null;

}

return null;
}

public Entry getEntry(int d)
{
for(int i = 0; i < numbers.size(); i++)
{
Entry ok2 = (Entry)numbers.get(d);
return ok2;
}

return null;

}

}

i think it has something to do with the numbers.add() part. Im not quite
sure, but if you could help me i would appreciate it.

Bryce · Guest

On Tue, 20 Jul 2004 20:42:34 -0400, "x1xsup3rm4nx1x"
<x1xsup3rm4nx1x (AT) hotmail (DOT) com> wrote:

x1xsup3rm4nx1x · Guest

no, he hasnt taught us any debugging

Roedy Green · Guest

On Thu, 22 Jul 2004 12:28:08 -0400, "x1xsup3rm4nx1x"
<x1xsup3rm4nx1x (AT) hotmail (DOT) com> wrote or quoted :