How do I make the submit, modify, and delete buttons work? I did the layout but need help in making action events. 

I also need help in making this GUI app using random access file. How do I do that?

 

Here's the classes I've created:

 

--Main Class

import javax.swing.JFrame;

public class Main {

public static void main(String[] args) {
 // TODO Auto-generated method stub
 
 ProductManager pro = new ProductManager();
 pro.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 pro.setSize(400, 400);
 pro.setVisible(true);

}

}

 

--------------

-- Product Class

public class Product {

//declared instance variables for product class

private static int count = 0;
int productId;
String productName;
double productPrice;

private boolean isFilled;

//declared constructors
public Product(int productId, String productName, double productPrice) {
 this.productId = productId;
 this.productName = productName;
 this.productPrice = productPrice;
//  setProductId(++count);
}

public Product() {
 this.productId = 0;

}

//getter for product ID
public int getProductId() {
 return productId;
}

//getter for product name
public String getProductName() {
 return productName;
}

//getter for product price
public double getProductPrice() {
 return productPrice;
}

}

 

--------------------

 

--ProductManager Class

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileReader;
import java.io.Writer;

import javax.swing.AbstractButton;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;

public class ProductManager extends JFrame {

//declare variables as JLabel
private JLabel productIdLabel;
private JLabel productNameLabel;
private JLabel productPriceLabel;

//declare variables as JTextfield
JTextField productIdField;
JTextField productNameField;
JTextField productPriceField;

//label for frame title
private JLabel frameTitle;

//JButtons for submit and search
private JButton submit;
private JButton modify;
private JButton delete;

//text area
// private JTextArea productManagerArea;
protected JTextArea area;

//constructor to initialize the components
public ProductManager() {
 setTitle("Product Manager");
 setLayout(null);
 
 //initialize ID label
 productIdLabel = new JLabel("Product ID: ");
 productIdLabel.setBounds(20, 50, 100, 30);
 this.add(productIdLabel);
 
 //initialize Name label
 productNameLabel = new JLabel("Product Name: ");
 productNameLabel.setBounds(20, 100, 100,30);
 this.add(productNameLabel);
 
 //initialize Price label
 productPriceLabel = new JLabel("Product Price: ");
 productPriceLabel.setBounds(20, 150, 100, 30);
 this.add(productPriceLabel);
 
 //initialize ID field
 productIdField = new JTextField("");
 productIdField.setBounds(150, 50, 150,30);
 this.add(productIdField);
 
 //initialize Name field
 productNameField = new JTextField("");
 productNameField.setBounds(150, 100, 150,30);
 this.add(productNameField);
 
 //initialize Price field
 productPriceField = new JTextField("");
 productPriceField.setBounds(150, 150, 150,30);
 this.add(productPriceField);
 
 //initialize buttons for submit, modify, deleter
 submit = new JButton("Submit");
 submit.setBounds(20, 250, 100, 30);
 this.add(submit);
 
 modify = new JButton("Modify");
 modify.setBounds(145, 250, 100, 30);
 this.add(modify);
 
 delete = new JButton("Delete");
 delete.setBounds(270, 250, 100, 30);
 this.add(delete);

 

Answer rating: 100% (QA)

Answer To make the buttons work you need to add action listeners to each button Inside the action listeners you can define what should happen when the button is clicked Heres how you can modify your P... View the full answer