Add Edit and Delete Employee Information Using Swing
In this section, you will learn how to add, edit and delete the Employee's
information from the database using java swing. For this purpose, we have used
three tabs using JTabbedPane class. Under these tabs, we have created
three forms using JLabel and JTextField class which are enclosed into a panel
which is then added to the JTabbedPane.
In the first tab, we have prompted the user to enter the form fields to save
the new employee's information into the database. The second tab will edit the
Employee's information. For this, again, we have created the same form with two
buttons. When the user enters the id and click the edit button, the information
of the particular employee will be displayed on the respective textfields and
the user can easily make changes in it. Then on clicking the save button, the information will
get updated. In the third tab, we have allowed the user to delete the particular
employee from the database. On entering the Employee id and click the button,
the information of that employee will get removed from the database.
Here is the code of EmployeeInformation.java
import java.io.*;
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import java.sql.*;
import java.util.*;
class EmployeeInformation {
JFrame f;
JPanel p1,p2,p3;
JTabbedPane tp;
ImageIcon btnimg1,btnimg2;
JLabel l1, l2, l3, l4,l5,l6,l7,l8,l9,l10;
JTextField tf1,tf2,tf3,tf4,tf5,tf6,tf7,tf8,tf9,tf10;
JScrollPane sp1;
JButton savebtn,resetbtn,editbtn1,editbtn2,deletebtn ;
EmployeeInformation(){
f=new JFrame("Form");
p1=new JPanel(new GridLayout(5,2));
p2=new JPanel(new GridLayout(5,2));
p3=new JPanel(new GridLayout(2,2));
tp=new JTabbedPane();
l1=new JLabel("Employee ID:");
l2=new JLabel("Employee Name:");
l3=new JLabel("Employee Address:");
l4=new JLabel("Salary:");
l5=new JLabel("Enter Employee ID to delete record:");
l7=new JLabel("Employee ID:");
l8=new JLabel("Employee Name:");
l9=new JLabel("Employee Address:");
l10=new JLabel("Salary:");
tf1=new JTextField(12);
tf2=new JTextField(12);
tf3=new JTextField(12);
tf4=new JTextField(12);
tf5=new JTextField(12);
tf6=new JTextField(12);
tf7=new JTextField(12);
tf8=new JTextField(12);
tf9=new JTextField(12);
tf10=new JTextField(12);
savebtn=new JButton(" Add ");
resetbtn=new JButton(" Reset");
editbtn1=new JButton(" Edit ");
editbtn2=new JButton(" Save");
deletebtn=new JButton("Delete");
p1.add(l1);
p1.add(tf1);
p1.add(l2);
p1.add(tf2);
p1.add(l3);
p1.add(tf3);
p1.add(l4);
p1.add(tf4);
p1.add(savebtn);
p1.add(resetbtn);
p2.add(l7);
p2.add(tf7);
p2.add(l8);
p2.add(tf8);
p2.add(l9);
p2.add(tf9);
p2.add(l10);
p2.add(tf10);
p2.add(editbtn1);
p2.add(editbtn2);
p3.add(l5);
p3.add(tf5);
p3.add(deletebtn);
resetbtn.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent ae){
tf1.setText("");
tf2.setText("");
tf3.setText("");
tf4.setText("");
}
});
savebtn.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent ae){
String value1=tf1.getText();
String value2=tf2.getText();
String value3=tf3.getText();
String value4=tf4.getText();
Connection con = null;
String url = "jdbc:mysql://localhost:3306/";
String db = "test";
String driver = "com.mysql.jdbc.Driver";
String user = "root";
String pass = "root";
System.out.println(value1+value2+value3+value4);
try{
Class.forName(driver);
con = DriverManager.getConnection(url+db, user, pass);
PreparedStatement st=con.prepareStatement("insert into employee(emp_id,emp_name,emp_address,
salary) values(?,?,?,?)");
st.setString(1,value1);
st.setString(2,value2);
st.setString(3,value3);
st.setString(4,value4);
st.executeUpdate();
JOptionPane.showMessageDialog(p1,"Data is successfully inserted into database.");
con.close();
}
catch(Exception e){
JOptionPane.showMessageDialog(p1,"Error in submitting data!");
}
}
});
deletebtn.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent ae){
String value1=tf5.getText();
Connection con = null;
String url = "jdbc:mysql://localhost:3306/";
String db = "test";
String driver = "com.mysql.jdbc.Driver";
String user = "root";
String pass = "root";
try{
Class.forName(driver);
con = DriverManager.getConnection(url+db, user, pass);
PreparedStatement st=con.prepareStatement("DELETE FROM employee WHERE emp_id = ?");
st.setString(1,value1);
st.executeUpdate();
JOptionPane.showMessageDialog(p3,"Record is deleted successfully.");
con.close();
}
catch(Exception exp3)
{
JOptionPane.showMessageDialog(p3,"Error in deleting record.");
}
}
});
editbtn1.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent ae){
String value=tf7.getText();
Connection con = null;
String url = "jdbc:mysql://localhost:3306/";
String db = "test";
String driver = "com.mysql.jdbc.Driver";
String user = "root";
String pass = "root";
try{
Class.forName(driver);
con = DriverManager.getConnection(url+db, user, pass);
PreparedStatement st=con.prepareStatement("select * from employee where emp_id=?");
st.setString(1,value);
ResultSet res=st.executeQuery();
res.next();
tf7.setText(Integer.toString(res.getInt(1)));
tf8.setText(res.getString(2));
tf9.setText(res.getString(3));
tf10.setText(Integer.toString(res.getInt(4)));
con.close();
}
catch(Exception e)
{
JOptionPane.showMessageDialog(p2,"Can not edit data");
}
}
});
editbtn2.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent ae){
Connection con = null;
String url = "jdbc:mysql://localhost:3306/";
String db = "test";
String driver = "com.mysql.jdbc.Driver";
String user = "root";
String pass = "root";
try
{
int x=JOptionPane.showConfirmDialog(p2,"Confirm edit? All data will be replaced");
if(x==0){
try{
String value1=tf7.getText();
String value2=tf8.getText();
String value3=tf9.getText();
String value4=tf10.getText();
Class.forName(driver);
con = DriverManager.getConnection(url+db, user, pass);;
Statement st=con.createStatement();
st.executeUpdate("update employee set emp_name='"+value2+"', emp_address='"+value3+"',
salary='"+value4+"' where emp_id='"+value1+"'");
JOptionPane.showMessageDialog(p2,"Updated successfully");
con.close();
}
catch(Exception ex)
{
JOptionPane.showMessageDialog(p2,"Error in updating edit fields");
}
}
}
catch(Exception ex)
{
JOptionPane.showMessageDialog(p2,"Error");
}
}
});
}
void dis()
{
f.getContentPane().add(tp);
tp.addTab("Add Record",p1);
tp.addTab("Edit Record",p2);
tp.addTab("Delete Record",p3);
f.setSize(350,180);
f.setVisible(true);
f.setResizable(true);
}
public static void main(String z[]){
EmployeeInformation pro=new EmployeeInformation();
pro.dis();
}
}
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