I NEED HELP WITH THIS QUESTION PROGRAMMING LANGUAGE : JAVA I \'M MAKING A PHONEB

Question

I NEED HELP WITH THIS QUESTION

PROGRAMMING LANGUAGE : JAVA

I 'M MAKING A PHONEBOOK WITH GRAPHICAL USER INTERFACE (GUI), HERE'S MY GUI:

BUT I DON'T KNOW HOW TO ADD EVENT TO GUI BUTTONS.

I HAVE CODES FOR THEM BUT LIKE I SAID I DON'T KNOW HOW TO ADD EVENTS TO THEM. HERE'S MY CODES FOR GUI BUTTONS:

"ADD" BUTTON SHOULD DO ADDING PERSONS IN ORDER TO THEIR NAMES

"REMOVE" BUTTON SHOULD DO REMOVING PERSONS

"A - Z" BUTTON SHOULD PRINT PERSONS IN ASCENDING ALPHABETICAL ORDER

"Z-A" BUTTON SHOULD DO PRINT PERSONS IN DESCENDING ALPHABETICAL ORDER

PLEASE CAN YOU HELP ME?

Explanation / Answer

For Java GUI I am assuming you are using Java Swing/AWT
Also I am assuming the variable names of objects for Text fields and buttons as :-

Name Text Field - nameField
Surname Text Field - surnameField
Phone Text Field - phoneField
Add Button - addButton
Remove Button - removeButton
Z - A Button - zaButton
A - Z Button - azButton
Display Text Area - displayArea

Also as you are passing an Arraylist of phone numbers to AddPerson method, I am
assuming that user will enter multiple phone numbers seperated by comma (,)

Below is the complete code for getting inputs from fields and adding listeners
to buttons. I have heavily commmented the code for deeper understanding.

// Get name from nameField
String name = nameField.getText();

//Get Surname from surnameField
String surname = surnameField.getText();

//Get phone numbers as string from phoneField
String phoneNumbers = phoneField.getText();

/* Now convert the phoneNumbers string to Array list of numbers by splitting the
* string whenever a comma (,) is encountered taking into account any white spaces, which
* will be trimmed in final Arraylist.
*/
List<String> phoneList = new ArrayList<String>(Arrays.asList(phoneNumbers.split("\s*,\s*")));

// Now adding listener to add button using anonymous inner class

addButton.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
//Here code will be executed after pressing the Add Button
// Using you AddPerson method
AddPerson(name + " " + surname, phoneList);
}
});

// Similarly adding Action Listener for Remove Button

removeButton.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
//Here code will be executed after pressing the Remove Button
// Using you RemovePerson method
RemovePerson(name + " " +surname);
}
});

// Now for A-Z and Z-A Buttons.

azButton.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
//Here code will be executed after pressing the A - Z Button
// Using you GetAscendingOrder method
displayArea.setText(GetAscendingOrder());
}
});

zaButton.addActionListener(new ActionListener(){
public void actionPerformed(ActionEvent e){
//Here code will be executed after pressing the Z - A Button
// Using you GetDescendingOrder method
displayArea.setText(GetDescendingOrder());
}
});

I Hope it helps!

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