Getting certain String from Arraylist

hm, I am following the instructions and examples, Ill post all my files

Loan.java

public class Loan extends java.lang.Object

{

private java.lang.String name;

private double rate, initialBalance;

private int length;

// Constructor: creates a new Loan object.

public Loan (java.lang.String name0, double rate0, double initialBalance0, int length0)

{

name = name0;

rate = rate0;

initialBalance = initialBalance0;

length = length0;

}

public double getInitialBalance()

{

return initialBalance;

}

public int getLength()

{

return length;

}

public java.lang.String getName()

{

return name;

}

public double getRate()

{

return rate;

}

}

LoanEntryPanel.java

import javax.swing.JFrame;

public class LoanEntryPanel

{

public static void main (String[] args)

{

JFrame frame = new JFrame ("Loan");

frame.setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE);

// Creates a LoanEntryobject

frame.getContentPane().add(new LoanEntry());

frame.pack();

frame.setVisible(true);

LoanEntry.java

import java.awt.*;

import java.awt.event.*;

import javax.swing.* ;

public class LoanEntry extends JPanel

{

// Creates buttons, input variables, and text field variables.

private JButton save, retrieve, exit;

private JLabel inputName, inputRate, inputInitialBalance, inputLoanLength;

private JTextField name, rate, initialBalance, loanLength;

private Loan loan;

private LoanFolder folder = new LoanFolder();

// Constructor: Sets up the GUI with the text fields blank.

public LoanEntry ()

{

inputName = new JLabel ("Name: ");

inputRate = new JLabel ("Rate: ");

inputInitialBalance = new JLabel ("Initial Balance: ");

inputLoanLength = new JLabel ("Loan length in months: ");

name = new JTextField (25);

rate = new JTextField (26);

initialBalance = new JTextField (21);

loanLength = new JTextField (16);

save = new JButton ("Save");

save.addActionListener (new SaveButtonListener());

retrieve = new JButton ("Retrieve");

retrieve.addActionListener (new RetrieveButtonListener());

exit = new JButton ("Exit");

exit.addActionListener (new ExitButtonListener());

add (inputName);

add (name);

add (inputRate);

add (rate);

add (inputInitialBalance);

add (initialBalance);

add (inputLoanLength);

add (loanLength);

add (save);

add (retrieve);

add (exit);

setPreferredSize (new Dimension(350, 150));

}

private class SaveButtonListener implements ActionListener

{

public void actionPerformed (ActionEvent event)

{

String borrowerName;

double loanRate, loanInitialBalance;

int length;

String text = name.getText();

borrowerName = text;

name.setText("");

text = rate.getText();

loanRate = Double.parseDouble (text);

rate.setText("");

text = initialBalance.getText();

loanInitialBalance = Double.parseDouble (text);

initialBalance.setText("");

text = loanLength.getText();

length = Integer.parseInt (text);

loanLength.setText("");

loan = new Loan (borrowerName, loanRate, loanInitialBalance, length);

folder.addLoan (loan);

}

}

private class RetrieveButtonListener implements ActionListener

{

public void actionPerformed (ActionEvent event)

{

String retrieveName, retrieveRate, retrieveInitialBalance, retrieveLength;

try

{

retrieveName = name.getText();

loan = folder.get(retrieveName);

retrieveRate = Double.toString(loan.getRate());

retrieveInitialBalance = Double.toString(loan.getInitialBalance());

retrieveLength = Integer.toString(loan.getLength());

rate.setText(retrieveRate);

initialBalance.setText(retrieveInitialBalance);

loanLength.setText(retrieveLength);

}

catch (NullPointerException e)// catches error of a null name

{

name.setText("Not available");

rate.setText("Not available");

initialBalance.setText("Not available");

loanLength.setText ("Not available");

}

}

}

private class ExitButtonListener implements ActionListener

{

public void actionPerformed (ActionEvent event)

{

System.exit(0); // exit program

}

}

}

LoanFolder.java

import java.util.ArrayList;

public class LoanFolder

{

private ArrayList<Loan> folder;

//--

// Constructor: Creates an initially empty Loan Array

//--

public LoanFolder()

{

ArrayList folder = new ArrayList();

}

public void addLoan (Loan e)

{

folder.add(e);

//folder.put(e.getName(), e);

}

public Loan getLoan (Loan e)

{

for(int i = 0; i <folder.size(); i++)

{

}

}

We were given the everything but the loanfolder. I have been stuck for couple days now, so I thought I would see if somone had a little hint or suggestion. Its blowing my mind.

Thanks>

teckademica at 2007-7-10 12:12:44 >

Ok so when in the LonEntry, when someone press retrieve it does retrieveName = name.getText(); and then loan = folder.get(retrieveName);

In the LoanFolder I need to get that entry from the ArrayList.

The get Method uses the index number to "Get" the correct Array. So i need to do a for loop to check each array to see if it is the correct Array. Then I am confused how to test each array.

public Loan getLoan (Loan e) is wrong because i need to get String Name?

teckademica at 2007-7-10 12:12:44 >

>I don't know what the requirements of your class are, but it might be >something like

>

>

>public Loan getLoan(String name){

>for(Loan loan : arrayOfLoans){

>loan.getName().equals(name)

>return loan;

>}

>}

Thanks for your help. Im starting to see how this works.

For the loan.getName().euals(name) do I need a ; after? If I dont it gives me the error

LoanFolder.java:34: ';' expected

return loan;

But when I add the ; after .equals(name) error

LonFolder.java:31: cannot find symbol

symbol : variable arrayOfLoans

location: class LoanFolder

for(Loan loan : arrayOfLoans)

Seems like its saying arrayOfLoans is a varable, do I need to set it to somthing?

Thanks you so much, kind person.

teckademica at 2007-7-10 12:12:44 >