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mohammed afsar
how to add two object in a particular file
1 Answer(s)      5 years and a month ago
Posted in : Java Beginners



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July 22, 2009 at 10:55 AM


Hi Friend,

Try the following code:

import java.io.*;
import java.util.*;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.sql.*;
class Form extends JFrame{

JButton ADD,RETRIEVE;
JPanel panel,pan;
JLabel label1,label2,label3,label4,label5;
final JTextField text1,text2,text3,text4,text5;
Form() {
label1 = new JLabel();
label1.setText("Employee Id:");
text1 = new JTextField(20);

label2 = new JLabel();
label2.setText("Employee Name:");
text2 = new JTextField(20);

label3 = new JLabel();
label3.setText("Employee Designation:");
text3 = new JTextField(20);

label4 = new JLabel();
label4.setText("Employee Salary:");
text4 = new JTextField(20);

label5 = new JLabel();
label5.setText("Employee Address:");
text5 = new JTextField(20);

ADD=new JButton("ADD");
RETRIEVE=new JButton("RETRIEVE");

panel=new JPanel(new GridLayout(6,2));
panel.add(label1);
panel.add(text1);
panel.add(label2);
panel.add(text2);
panel.add(label3);
panel.add(text3);
panel.add(label4);
panel.add(text4);
panel.add(label5);
panel.add(text5);
panel.add(ADD);
panel.add(RETRIEVE);
add(panel,BorderLayout.CENTER);
setTitle("FORM");

ADD.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent ae){
String id[]={text1.getText()};
String name[]={text2.getText()};
String des[]={text3.getText()};
String sal[]={text4.getText()};
String add[]={text5.getText()};

java.util.List<String> list = new ArrayList<String>();
list.add("ID"+" Name"+" Designation"+" Salary"+" Address");

java.util.List<String> list1 = new ArrayList<String>();
for(int i = 0; i < id.length; i++) {
String line = id[i]+" "+name[i]+" "+des[i]+" "+sal[i]+" "+add[i];
list1.add(line);

java.util.List<String> list2 = new ArrayList<String>();
list2.addAll(list);
list2.addAll(list1);
BufferedWriter out = null;
try {
File file = new File("Employee.txt");
out = new BufferedWriter(new FileWriter(file,true));
for (String s : list2) {
out.write(s);
out.newLine();
}
out.close();
} catch(IOException e) {}
}
}
});
RETRIEVE.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent ae){
File file=new File("Employee.txt");
FileInputStream fis = null;
BufferedInputStream bis = null;
DataInputStream dis = null;
String data="";
try {
fis = new FileInputStream(file);
bis = new BufferedInputStream(fis);
dis = new DataInputStream(bis);
while (dis.available() != 0) {
data+=dis.readLine()+"\n";
}
System.out.println(data);
JTextArea area =new JTextArea(10,25);
JScrollPane sPane = new JScrollPane(area);
area.setText(data);
pan=new JPanel();
pan.add(sPane);
JFrame frame=new JFrame();
frame.add(pan);
frame.setSize(300,100);
frame.setVisible(true);

fis.close();
bis.close();
dis.close();
}
catch(Exception e){}
}
});
}
/*private static void writeToFile(java.util.List<String> list, String path) {
BufferedWriter out = null;
try {
File file = new File(path);
out = new BufferedWriter(new FileWriter(file,true));
for (String s : list) {
out.write(s);
out.newLine();
}
out.close();
} catch(IOException e) {}
}*/
}
class Inventory{
public static void main(String arg[]) {
try
{
Form frame=new Form();
frame.setSize(300,300);
frame.setVisible(true);
}
catch(Exception e)
{}
}
}

Hope that it will be helpful for you.
Thanks


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