Cara membuat file chooser di Java
Dalam sebuah aplikasi berbasis java, kadang kita memerlukan sebuah interface untuk membaca/membuka sebuah file. Untuk melakukan hal tersebut kita dapat memanfaatkan class “JFileChooser” milik java, kemudian kita berikan filter sehingga hanya file-file tertentu saja yang dapat dibuka/dibaca misal: file *.txt. Pada kesempatan kali ini saya menggunakan editor Netbeans IDE 6.5.1 untuk membuat interface nya, silakan ikuti langkah-langkah dibawah ini:
- Buat sebuah file baru pada project anda dengan cara meng-klik kanan pada project >> new >> JFrame
- Selanjutnya tambahkan JTextField/textbox,JButton,dan JTextArea
- Berikan sebuah event pada JButton dengan cara klik kanan pada JButton >> Events >> Action >>Action Performed. Tambahkan kode berikut :
JFileChooser chooser = new JFileChooser("C:\\");
FileNameExtensionFilter filter=new FileNameExtensionFilter("SQL FILE","sql","txt","TXT");
chooser.addChoosableFileFilter(filter);
chooser.setDialogTitle("Pilih File...");
int opt = chooser.showOpenDialog(this);
String dir = chooser.getSelectedFile().getAbsolutePath();
String newString = dir.replace('\\', '/');
String myStr = dir + "\\" + ((chooser.getSelectedFile() != null) ? chooser.getSelectedFile().getName() : "nothing");
txtPath.setText(newString);
if (opt == chooser.APPROVE_OPTION) {
try {
isiFile.setText("");
reader = new BufferedReader(new FileReader(newString));
try {
while ((data = reader.readLine()) != null) {
isiFile.append(data+"\n");
isiFile.setWrapStyleWord(true);
}
} catch (IOException ex) {
Logger.getLogger(bacaFile.class.getName()).log(Level.SEVERE, null, ex);
}
} catch (FileNotFoundException ex) {
Logger.getLogger(bacaFile.class.getName()).log(Level.SEVERE, null, ex);
}
}
Source Code selengkapnya :
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
/*
* bacaFile.java
*
* Created on Mar 10, 2009, 8:42:32 PM
*/
package paket_aplikasiNilai;
import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.JFileChooser;
import javax.swing.UIManager;
import javax.swing.filechooser.FileNameExtensionFilter;
/**
*
* @author lambang
*/
public class bacaFile extends javax.swing.JFrame {
private String data;
private BufferedReader reader;
/** Creates new form bacaFile */
public bacaFile() {
initComponents();
}
@SuppressWarnings("unchecked")
// kode yg digenerate oleh Netbeans
private void initComponents() {
jPanel1 = new javax.swing.JPanel();
txtPath = new javax.swing.JTextField();
btnBrowse = new javax.swing.JButton();
jScrollPane1 = new javax.swing.JScrollPane();
isiFile = new javax.swing.JTextArea();
setTitle("BACA FILE");
setResizable(false);
jPanel1.setBorder(javax.swing.BorderFactory.createTitledBorder(new org.jvnet.substance.utils.border.SubstanceEtchedBorder(), "File Directory", javax.swing.border.TitledBorder.DEFAULT_JUSTIFICATION, javax.swing.border.TitledBorder.DEFAULT_POSITION, new java.awt.Font("FreeSans", 1, 11))); // NOI18N
jPanel1.setName("jPanel1"); // NOI18N
txtPath.setFont(new java.awt.Font("Tahoma", 1, 12));
txtPath.setForeground(new java.awt.Color(255, 0, 0));
txtPath.setName("txtPath"); // NOI18N
btnBrowse.setText("Browse");
btnBrowse.setHorizontalTextPosition(javax.swing.SwingConstants.CENTER);
btnBrowse.setIconTextGap(5);
btnBrowse.setName("btnBrowse"); // NOI18N
btnBrowse.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
btnBrowseActionPerformed(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()
.addContainerGap()
.addComponent(txtPath, javax.swing.GroupLayout.PREFERRED_SIZE, 270, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(btnBrowse, javax.swing.GroupLayout.PREFERRED_SIZE, 87, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap(105, Short.MAX_VALUE))
);
jPanel1Layout.setVerticalGroup(
jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel1Layout.createSequentialGroup()
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING)
.addComponent(btnBrowse, javax.swing.GroupLayout.DEFAULT_SIZE, 33, Short.MAX_VALUE)
.addComponent(txtPath, javax.swing.GroupLayout.DEFAULT_SIZE, 33, Short.MAX_VALUE))
.addContainerGap())
);
jScrollPane1.setName("jScrollPane1"); // NOI18N
isiFile.setColumns(60);
isiFile.setFont(new java.awt.Font("Courier New", 0, 13)); // NOI18N
isiFile.setForeground(new java.awt.Color(0, 102, 204));
isiFile.setRows(10);
isiFile.setName("isiFile"); // NOI18N
jScrollPane1.setViewportView(isiFile);
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(jPanel1, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(jScrollPane1, 0, 0, Short.MAX_VALUE))
.addGap(18, 18, 18))
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(17, 17, 17)
.addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 238, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap(30, Short.MAX_VALUE))
);
pack();
}// Akhir kode yg digenerate Netbeans
private void btnBrowseActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
JFileChooser chooser = new JFileChooser("C:\\");
FileNameExtensionFilter filter=new FileNameExtensionFilter("SQL FILE","sql","txt","TXT");
chooser.addChoosableFileFilter(filter);
chooser.setDialogTitle("Pilih File...");
int opt = chooser.showOpenDialog(this);
String dir = chooser.getSelectedFile().getAbsolutePath();
String newString = dir.replace('\\', '/');
String myStr = dir + "\\" + ((chooser.getSelectedFile() != null) ? chooser.getSelectedFile().getName() : "nothing");
txtPath.setText(newString);
if (opt == chooser.APPROVE_OPTION) {
try {
isiFile.setText("");
reader = new BufferedReader(new FileReader(newString));
try {
while ((data = reader.readLine()) != null) {
isiFile.append(data+"\n");
isiFile.setWrapStyleWord(true);
}
} catch (IOException ex) {
Logger.getLogger(bacaFile.class.getName()).log(Level.SEVERE, null, ex);
}
} catch (FileNotFoundException ex) {
Logger.getLogger(bacaFile.class.getName()).log(Level.SEVERE, null, ex);
}
}
}
public static void main(String args[]) throws ClassNotFoundException {
try {
UIManager.setLookAndFeel("com.jtattoo.plaf.acryl.AcrylLookAndFeel");
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
bacaFile login=new bacaFile();
login.pack();
login.setVisible(true);
}
});
}catch(Exception ex){
}
}
// Variables declaration - do not modify
private javax.swing.JButton btnBrowse;
private javax.swing.JTextArea isiFile;
private javax.swing.JPanel jPanel1;
private javax.swing.JScrollPane jScrollPane1;
private javax.swing.JTextField txtPath;
// End of variables declaration
}
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