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
 */
package com.bijon.saha;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.util.logging.Level;
import java.util.logging.Logger;


public class FileInputOutput extends javax.swing.JFrame {


    public FileInputOutput()
    {
        initComponents();

        this.setTitle("বিজনের নোটপ্যাড ");
        this.setLocationRelativeTo(null);
    }

    /**
     * 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() {

        jPanel1 = new javax.swing.JPanel();
        openButton = new javax.swing.JButton();
        jScrollPane1 = new javax.swing.JScrollPane();
        textArea = new javax.swing.JTextArea();
        saveButton = new javax.swing.JButton();
        fileName = new javax.swing.JTextField();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
        getContentPane().setLayout(new org.netbeans.lib.awtextra.AbsoluteLayout());

        openButton.setText("Open...");
        openButton.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                openButtonActionPerformed(evt);
            }
        });

        textArea.setColumns(20);
        textArea.setRows(5);
        jScrollPane1.setViewportView(textArea);

        saveButton.setText("Save");
        saveButton.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                saveButtonActionPerformed(evt);
            }
        });

        javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
        jPanel1.setLayout(jPanel1Layout);
        jPanel1Layout.setHorizontalGroup(
            jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel1Layout.createSequentialGroup()
                .addGap(15, 15, 15)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
                    .addComponent(saveButton)
                    .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                        .addGroup(jPanel1Layout.createSequentialGroup()
                            .addComponent(fileName)
                            .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                            .addComponent(openButton))
                        .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 340, javax.swing.GroupLayout.PREFERRED_SIZE)))
                .addGap(15, 15, 15))
        );
        jPanel1Layout.setVerticalGroup(
            jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(jPanel1Layout.createSequentialGroup()
                .addGap(16, 16, 16)
                .addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING, false)
                    .addComponent(openButton, javax.swing.GroupLayout.DEFAULT_SIZE, 34, Short.MAX_VALUE)
                    .addComponent(fileName))
                .addGap(7, 7, 7)
                .addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 169, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(saveButton, javax.swing.GroupLayout.DEFAULT_SIZE, 38, Short.MAX_VALUE))
        );

        getContentPane().add(jPanel1, new org.netbeans.lib.awtextra.AbsoluteConstraints(0, 0, 370, 270));

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

    private void openButtonActionPerformed(java.awt.event.ActionEvent evt) {
        // TODO add your handling code here:
        String fName = fileName.getText();
        File file = new File(fName);
        try {
            BufferedReader in = new BufferedReader(new InputStreamReader(new FileInputStream(file)));
            String content = "";
            String temp;
            while((temp=in.readLine())!=null){
                content+=temp;
                content+="\n";
            }
            textArea.setText(content);
            in.close();
        } catch (FileNotFoundException ex) {
            Logger.getLogger(FileInputOutput.class.getName()).log(Level.SEVERE, null, ex);
        } catch (IOException ex) {
            Logger.getLogger(FileInputOutput.class.getName()).log(Level.SEVERE, null, ex);
        }


    }

    private void saveButtonActionPerformed(java.awt.event.ActionEvent evt) {
        // TODO add your handling code here:
        String fName = fileName.getText();
        File file = new File(fName);
        try {
            String text = textArea.getText();
            BufferedWriter out = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(file)));
            out.write(text);
            out.close();
        } catch (FileNotFoundException ex) {
            Logger.getLogger(FileInputOutput.class.getName()).log(Level.SEVERE, null, ex);
        } catch (IOException ex) {
            Logger.getLogger(FileInputOutput.class.getName()).log(Level.SEVERE, null, ex);
        }
    }

    /**
     * @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(FileInputOutput.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(FileInputOutput.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(FileInputOutput.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(FileInputOutput.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }
        //</editor-fold>

        /* Create and display the form */
        java.awt.EventQueue.invokeLater(() -> {
            new FileInputOutput().setVisible(true);
        });
    }

    // Variables declaration - do not modify
    private javax.swing.JTextField fileName;
    private javax.swing.JPanel jPanel1;
    private javax.swing.JScrollPane jScrollPane1;
    private javax.swing.JButton openButton;
    private javax.swing.JButton saveButton;
    private javax.swing.JTextArea textArea;
    // End of variables declaration
}