Question

JAVA

Write Java application to write/read serialized objects of class Account: AccNo(int),
AccName(String), AccBalance(float). Develop a look-and-feel GUI (Swing or
JavaFX) for this application.

Answer 1

package file;

import java.awt.*;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.io.*;

import java.util.ArrayList;

import javax.swing.*;

class Account implements Serializable

{

private static final long serialVersionUID = 1L;

private int accNo;

private String accName;

private float accBalance;

Account()

{

accNo = 0;

accName = "";

accBalance = 0.0f;

}

Account(int accno, String name, float balance)

{

accNo = accno;

accName = name;

accBalance = balance;

}

@Override

public String toString()

{

return "\n\n Account Number:" + accNo + "\n Name: " + accName

+ "\n Account Balance: " + accBalance;

}

}

class ReadWriteOperation implements ActionListener

{

JFrame jf;

JPanel panel1, panel2, mainP;

JLabel accL, nameL, balanceL;

JTextField accT, nameT, balanceT;

JButton saveB, loadB, exitB;

ReadWriteOperation()

{

jf = new JFrame("Bank Account");

panel1 = new JPanel();

panel2 = new JPanel();

mainP = new JPanel();

accL = new JLabel("Enter Account Number: ");

nameL = new JLabel("Enter Account Name: ");

balanceL = new JLabel("Enter Initial Balance: ");

accT = new JTextField(10);

nameT = new JTextField(10);

balanceT = new JTextField(10);

saveB = new JButton("SAVE");

loadB = new JButton("LOAD");

exitB = new JButton("EXIT");

saveB.addActionListener(this);

loadB.addActionListener(this);

exitB.addActionListener(this);

panel1.add(accL);

panel1.add(accT);

panel1.add(nameL);

panel1.add(nameT);

panel1.add(balanceL);

panel1.add(balanceT);

panel1.setLayout(new GridLayout(3, 2));

panel2.add(saveB);

panel2.add(loadB);

panel2.add(exitB);

mainP.add(panel1);

mainP.add(panel2);

mainP.setLayout(new GridLayout(2, 1));

jf.add(mainP);

jf.setVisible(true);

//jf.setSize(300, 300);

jf.pack();

jf.setLocationRelativeTo(null);

jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

}

public void actionPerformed(ActionEvent ee)

{

if(ee.getSource() == saveB)

writeFile();

else if(ee.getSource() == loadB)

readFile();

else if(ee.getSource() == exitB)

System.exit(0);

}

void writeFile()

{

try

{

Account acc = new Account(Integer.parseInt(accT.getText()),

nameT.getText(), Float.parseFloat(balanceT.getText()));

ObjectOutputStream o = new ObjectOutputStream(

new FileOutputStream(new File("accountInfo.txt"), true));

// Write objects to file

o.writeObject(acc);

o.close();

}

catch (FileNotFoundException e)

{

System.out.println("File not found");

}

catch (IOException e)

{

System.out.println("Error initializing stream");

}

}

void readFile()

{

try

{

FileInputStream f = new FileInputStream("accountInfo.txt");

ObjectInputStream oi = new ObjectInputStream(f);

ArrayList<Account> acc = new ArrayList<Account>();

acc.add((Account)oi.readObject());

JOptionPane.showMessageDialog(jf, acc,

"Account Information", JOptionPane.INFORMATION_MESSAGE);

oi.close();

/*for(int c = 0; c < acc.size(); c++)

JOptionPane.showMessageDialog(jf, acc.get(c),

"Account Information", JOptionPane.INFORMATION_MESSAGE);*/

}

catch (FileNotFoundException e)

{

System.out.println("File not found");

}

catch (IOException e)

{

System.out.println("Error initializing stream");

}

catch (ClassNotFoundException e)

{

// TODO Auto-generated catch block

e.printStackTrace();

}

}

}

public class SerializedReadWriteAccount

{

public static void main(String ss[])

{

new ReadWriteOperation();

}

}