user_list.java

/*
 * Click nbfs://nbhost/SystemFileSystem/Templates/Licenses/license-default.txt to change this license
 * Click nbfs://nbhost/SystemFileSystem/Templates/GUIForms/JFrame.java to edit this template
 */

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.Statement;
import javax.swing.JFrame;
import javax.swing.JOptionPane;
import javax.swing.table.DefaultTableModel;

/**
 *
 * @author Hrudai Aditya
 */
public class user_list extends javax.swing.JFrame {

    /**
     * Creates new form user_list
     */
    public user_list() {
        initComponents();
        setVisible(false);
    }

    /**
     * This method is called from within the constructor to initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is always
     * regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">                          
    private void initComponents() {

        jScrollPane1 = new javax.swing.JScrollPane();
        jTable1 = new javax.swing.JTable();
        jButton1 = new javax.swing.JButton();
        jButton2 = new javax.swing.JButton();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        jTable1.setModel(new javax.swing.table.DefaultTableModel(
            new Object [][] {
                {null, null, null},
                {null, null, null},
                {null, null, null},
                {null, null, null}
            },
            new String [] {
                "Userid", "User_name", "State"
            }
        ));
        jScrollPane1.setViewportView(jTable1);

        jButton1.setText("<-");
        jButton1.setActionCommand("<--");
        jButton1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton1ActionPerformed(evt);
            }
        });

        jButton2.setFont(new java.awt.Font("Segoe UI", 1, 18)); // NOI18N
        jButton2.setText("GET DATA");
        jButton2.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton2ActionPerformed(evt);
            }
        });

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addGroup(layout.createSequentialGroup()
                        .addContainerGap()
                        .addComponent(jButton1))
                    .addGroup(layout.createSequentialGroup()
                        .addGap(255, 255, 255)
                        .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 476, javax.swing.GroupLayout.PREFERRED_SIZE)))
                .addContainerGap(227, Short.MAX_VALUE))
            .addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
                .addGap(0, 0, Short.MAX_VALUE)
                .addComponent(jButton2)
                .addGap(403, 403, 403))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addComponent(jButton1)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 320, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addGap(18, 18, 18)
                .addComponent(jButton2)
                .addContainerGap(54, Short.MAX_VALUE))
        );

        pack();
    }// </editor-fold>                        

    private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {                                         
        // TODO add your handling code here:
        try{  
 //step1 load the driver class  
        	Class.forName("oracle.jdbc.driver.OracleDriver");  
        	  
        	//step2 create  the connection object  
        	Connection con=DriverManager.getConnection("jdbc:oracle:thin:@218.248.0.7:1521:RDBMS","it20737122","vasavi");  
   
                String sql = "SELECT * FROM userview";
                PreparedStatement statement = con.prepareStatement(sql);             
                statement.execute();
                int rowsfound = statement.executeUpdate();
                if(rowsfound==0) 
               	 {
                        //write logic for data insertion into the database
                        JOptionPane.showMessageDialog(new JFrame(),"No details Found! ", "error", JOptionPane.ERROR_MESSAGE);
                 }
                else {
        	 Statement st=con.createStatement();
                 String query="SELECT * FROM userview" ;
                 System.out.println(query);
                 //PreparedStatement st = con.prepareStatement(query);
                 ResultSet rs=st.executeQuery(query);
                 //table.setModel(DbUtils.resultSetToTableModel(rs));
                 while(rs.next())
                         {
                           String aid=String.valueOf(rs.getInt("user_id"));
                           String cid=rs.getString("user_name");
                           String day=rs.getString("state");
                           String tbData[]={aid,cid,day};
                           DefaultTableModel tblModel=(DefaultTableModel)jTable1.getModel();
                           tblModel.addRow(tbData);
                         }
            System.out.println(query);}
            
        	//stmt.executeQuery(query);  
        	System.out.println("Done");
        	  
        	//close the connection object  
        	con.close();  
        	  
        	}catch(Exception e){ 
        		System.out.println(e);
        		}
    }                                        

    private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {                                         
        // TODO add your handling code here:
        dispose();
    }                                        

    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        /* Set the Nimbus look and feel */
        //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
        /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
         * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html 
         */
        try {
            for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
                if ("Nimbus".equals(info.getName())) {
                    javax.swing.UIManager.setLookAndFeel(info.getClassName());
                    break;
                }
            }
        } catch (ClassNotFoundException ex) {
            java.util.logging.Logger.getLogger(user_list.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(user_list.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(user_list.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(user_list.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }
        //</editor-fold>

        /* Create and display the form */
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new user_list().setVisible(true);
            }
        });
    }

    // Variables declaration - do not modify                     
    private javax.swing.JButton jButton1;
    private javax.swing.JButton jButton2;
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JTable jTable1;
    // End of variables declaration                   
}