NewJFrame.java

package stopwatch;

import java.io.EOFException;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.util.ArrayList;
import javax.swing.JOptionPane;

public class NewJFrame extends javax.swing.JFrame {
    public int h;
    public int m;
    public int s;
    public int m_s;
    ArrayList<timestamp> timestamps;
    
    public NewJFrame(){
        
    }
    
    public NewJFrame(int hrs,int min,int sec,int milisec) {
        initComponents();
        this.h=hrs;
        this.m=min;
        this.s=sec;
        this.m_s=milisec;
        timestamps=new ArrayList<timestamp>();
        populateArrayList();
    }
    
    public void populateArrayList(){
        try{
            FileInputStream file = new FileInputStream("Timestamps.txt");
            ObjectInputStream inputFile = new ObjectInputStream(file);
            
            boolean endOfFile = false;
            while(!endOfFile){
                try{
                    timestamps.add((timestamp) inputFile.readObject());
                }
                catch(EOFException e){
                    endOfFile = true;
                }
                catch(Exception f){
                    JOptionPane.showMessageDialog(null, f.getMessage());
                }
            }
            inputFile.close();
        }
        catch(IOException e){
            JOptionPane.showMessageDialog(null, e.getMessage());
        }
    }
    
    public void saveUsersToFile(){
        try{
            FileOutputStream file = new FileOutputStream("Timestamps.txt");
            ObjectOutputStream outputFile = new ObjectOutputStream(file);
            for(int i=0;i<timestamps.size();i++){
                outputFile.writeObject(timestamps.get(i));
            }
            outputFile.close();
            JOptionPane.showMessageDialog(null, "Successfully saved data!");
            this.dispose();
        }
        catch(IOException e){
            JOptionPane.showMessageDialog(null, e.getMessage());
        }
    }

    @SuppressWarnings("unchecked")
    // <editor-fold defaultstate="collapsed" desc="Generated Code">//GEN-BEGIN:initComponents
    private void initComponents() {

        jLabel1 = new javax.swing.JLabel();
        jTextField1 = new javax.swing.JTextField();
        jButton1 = new javax.swing.JButton();

        setDefaultCloseOperation(javax.swing.WindowConstants.DISPOSE_ON_CLOSE);

        jLabel1.setFont(new java.awt.Font("Tahoma", 1, 18)); // NOI18N
        jLabel1.setText("Enter name for Timestamp :");

        jTextField1.setFont(new java.awt.Font("Tahoma", 0, 18)); // NOI18N

        jButton1.setFont(new java.awt.Font("Tahoma", 1, 18)); // NOI18N
        jButton1.setText("Save");
        jButton1.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton1ActionPerformed(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()
                .addContainerGap(69, Short.MAX_VALUE)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING, false)
                    .addComponent(jTextField1)
                    .addComponent(jLabel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
                .addGap(67, 67, 67))
            .addGroup(layout.createSequentialGroup()
                .addGap(155, 155, 155)
                .addComponent(jButton1)
                .addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGap(50, 50, 50)
                .addComponent(jLabel1)
                .addGap(62, 62, 62)
                .addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addGap(55, 55, 55)
                .addComponent(jButton1)
                .addContainerGap(52, Short.MAX_VALUE))
        );

        pack();
    }// </editor-fold>//GEN-END:initComponents

    private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_jButton1ActionPerformed
        String newname;
        newname = jTextField1.getText().trim();
        if(newname.isBlank()){
            JOptionPane.showMessageDialog(null, "Please enter all fields!");
        }
        else {
            timestamp t;
            t = new timestamp(this.h,this.m,this.s,this.m_s,newname);
            timestamps.add(t);
            saveUsersToFile();
        }
    }//GEN-LAST:event_jButton1ActionPerformed

    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(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(NewJFrame.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 NewJFrame().setVisible(true);
            }
        });
    }

    // Variables declaration - do not modify//GEN-BEGIN:variables
    private javax.swing.JButton jButton1;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JTextField jTextField1;
    // End of variables declaration//GEN-END:variables
}