Photo Album

package TP;

import java.awt.*;
import java.io.*;
import javax.swing.*;
import java.awt.event.*;

/**
 *
 * @author BlackRose
 */
public class PhotoAlbum extends javax.swing.JFrame {

    public PhotoAlbum() {
        initComponents();
        showImage(pos);
    }

    int pos = 0;

    public String[] getImages() {
        File file = new File(getClass().getResource("/TP/Images/").getFile());
        String[] imagesList = file.list();
        return imagesList;
    }

    public void showImage(int index){
        String[] imagesList = getImages();
        String imageName = imagesList[index];
        ImageIcon icon = new ImageIcon(getClass().getResource("/TP/Images/"+imageName));
        Image image =icon.getImage().getScaledInstance(jLabel_Image.getWidth(), jLabel_Image.getHeight(), Image.SCALE_SMOOTH);
        jLabel_Image.setIcon(new ImageIcon(image));
    }

    @SuppressWarnings("unchecked")
    private void initComponents() {

        jLabel_Image = new javax.swing.JLabel();
        jButton_previous = new javax.swing.JButton();
        jButton_next = new javax.swing.JButton();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        jButton_previous.setText("Previous");
        jButton_previous.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton_previousActionPerformed(evt);
            }
        });

        jButton_next.setText("Next");
        jButton_next.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                jButton_nextActionPerformed(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()
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
                    .addComponent(jLabel_Image, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                    .addGroup(layout.createSequentialGroup()
                        .addComponent(jButton_previous, javax.swing.GroupLayout.PREFERRED_SIZE, 119, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addGap(18, 18, 18)
                        .addComponent(jButton_next, javax.swing.GroupLayout.PREFERRED_SIZE, 119, javax.swing.GroupLayout.PREFERRED_SIZE)
                        .addGap(0, 797, Short.MAX_VALUE)))
                .addContainerGap())
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addContainerGap()
                .addComponent(jLabel_Image, javax.swing.GroupLayout.PREFERRED_SIZE, 599, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addGap(18, 18, Short.MAX_VALUE)
                .addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
                    .addComponent(jButton_previous, javax.swing.GroupLayout.PREFERRED_SIZE, 38, javax.swing.GroupLayout.PREFERRED_SIZE)
                    .addComponent(jButton_next, javax.swing.GroupLayout.PREFERRED_SIZE, 38, javax.swing.GroupLayout.PREFERRED_SIZE))
                .addContainerGap())
        );

        pack();
    }

    private void jButton_nextActionPerformed(java.awt.event.ActionEvent evt) {
        pos = pos +1;
        if(pos >= getImages().length){
            pos = getImages().length -1;
        }
        showImage(pos);
    }

    private void jButton_previousActionPerformed(java.awt.event.ActionEvent evt) {
        pos = pos -1;
         if(pos < 0){
            pos = 0;
        }
        showImage(pos);
    }

     public static void main(String args[]) {
         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(PhotoAlbum.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(PhotoAlbum.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(PhotoAlbum.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(PhotoAlbum.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }

        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new PhotoAlbum().setVisible(true);
            }
        });
    }

    private javax.swing.JButton jButton_next;
    private javax.swing.JButton jButton_previous;
    private javax.swing.JLabel jLabel_Image;
}