Java Login: Read Password from text file

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Java Swing tutorial

This is a Java Swing tutorial. The Java Swing tutorial is suited for beginners and intermediate Swing developers. After reading this tutorial, you will be able to develop non-trivial Java Swing applications.

Table of contents

• Introduction
• First Programs
• Menus and Toolbars
• Swing Layout Management
• Swing Events
• Swing Dialogs
• Basic Swing Components
• Basic Swing Components II
• Swing models
• Drag and Drop
• Painting
• Resizable component
• Puzzle
• Tetris

Swing

Swing is a principal GUI toolkit for the Java programming language. It is a part of the JFC (Java Foundation Classes), which is an API for providing a graphical user interface for Java programs. It is completely written in Java.

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http://zetcode.com/tutorials/javaswingtutorial/

Java SE Basic Input Form Save To Text File

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import java.awt.GridLayout;

 

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

 

import java.io.BufferedWriter;

import java.io.FileWriter;

import java.io.FileNotFoundException;

import java.io.IOException;

import java.io.File;

 

import javax.swing.JLabel;

import javax.swing.JDialog;

import javax.swing.JFrame;

import javax.swing.JPanel;

import javax.swing.JButton;

import javax.swing.JTextField;

import javax.swing.SwingUtilities;

 

public class OpenningForm {

    public static void main(String[] args) {

        SwingUtilities.invokeLater(new Runnable() {

             

            @Override

            public void run() {

                BasicForm frame = new BasicForm("Basic Frame");

                frame.createGUI();

            }

        });

    }

 

}

 

class BasicForm extends JFrame {

    public BasicForm(String name) {

        setTitle(name);

        BasicPanel panel = new BasicPanel();

        add(panel);

        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        setSize(300,300);

         

    }

    public void createGUI() {

        setVisible(true);

    }

}

 

class BasicPanel extends JPanel {

    public BasicPanel() {

        JButton button = new JButton("New...");

        button.addActionListener(new ActionListener() {

             

            public void actionPerformed(ActionEvent arg0) {

                InputDialog inputForm = new InputDialog();

                inputForm.setVisible(true);

            }

        });

        add(button);

    }

}

 

class InputDialog extends JDialog {

    public InputDialog() {

        InputPanel panel = new InputPanel();

        setTitle("Input Dialog");

        add(panel);

        setSize(200,150);

        setLocationRelativeTo(null);

        setDefaultCloseOperation(JFrame.HIDE_ON_CLOSE);

        setVisible(false);

    }

}

 

 

class InputPanel extends JPanel {

    JTextField firstNameField;

     JTextField secondNameField;

     JTextField phoneNumber;

      

    public InputPanel() {

        GridLayout gridLayout = new GridLayout(4,2);

        setLayout(gridLayout);

         firstNameField = new JTextField(20);

         secondNameField = new JTextField(20);

         phoneNumber = new JTextField(15);

         JLabel firstNameLabel = new JLabel("First name: ");

         JLabel secondNameLabel = new JLabel("Second name: ");

         JLabel phoneNumberLabel = new JLabel("Phone number: ");

          

         JButton saveToFileButton = new JButton("Save to file");

          

         saveToFileButton.addActionListener(new ActionListener() {

             

            @Override

            public void actionPerformed(ActionEvent e) {

                BufferedWriter writer;

                try {

                    //File file = new File("contacts.txt");

                    writer = new BufferedWriter(new FileWriter("contacts.txt",true));

                    writer.write(firstNameField.getText() + "\t" + secondNameField.getText() + "\t" + phoneNumber.getText());

                    writer.newLine();

                    writer.close();

                } catch(FileNotFoundException ex) {

                    ex.printStackTrace();

                } catch (IOException ex) {

                    ex.printStackTrace();

                }

                 

            }

        });

         add(firstNameLabel);

         add(firstNameField);

         add(secondNameLabel);

         add(secondNameField);

         add(phoneNumberLabel);

         add(phoneNumber);

         add(saveToFileButton);

    }                  

}

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from: http://www.java-forums.org/awt-swing/28591-create-form-input-some-data-save-file.html