Buat file java applet di Neatbeans dan tentukan nama file dan package:
2. Jika sudah tulis coding di bawah ini di bawah package:
import java.io.BufferedInputStream;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.DataInputStream;
import javax.swing.JOptionPane;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import javax.swing.JFileChooser;
import javax.swing.JFrame;
import javax.swing.*;
import java.io.*;
import javax.swing.filechooser.FileFilter;
import java.io.IOException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.Random;
import java.util.logging.Level;
import java.util.logging.Logger;
3. Jika sudah tulis method dan coding di dalam source java applet:
Cari coding public class dan tulis codingnya
public class enskripsi1 extends javax.swing.JApplet {
public String text, namafiletext;
JFileChooser fc;
File file;
boolean fileBaru;
boolean fileBaru1;
final String[] EXT = {(".csv")};
final String[] EXT2 = {(".txt")};
cari coding “public void init() {“ dan tulis coding di bawah ini:
fc = new JFileChooser();
fc.addChoosableFileFilter(new jenisFile(EXT));
fc.addChoosableFileFilter(new jenisFile(EXT2));
fc.setAcceptAllFileFilterUsed(false);
fileBaru = true;
fileBaru1 = true;
buat method di bawah ini:
private void msg(String pesan) {
JOptionPane.showMessageDialog(this, pesan, "Informasi",
JOptionPane.INFORMATION_MESSAGE);
}
private boolean okToReplace() {
return (JOptionPane.showConfirmDialog(this, "File " + file.getName() + " Sudah Ada\n"
+ "Akan Ditimpa ?",
"Peringatan", JOptionPane.YES_NO_OPTION) == 0);
}
private void SimpanFile() {
PrintWriter pw = null;
try {
pw = new PrintWriter(new BufferedWriter(new FileWriter(file)));
} catch (IOException e) {
msg("Gagal Simpan File : '" + file.getName());
return;
}
pw.print(isi.getText());
pw.close();
fileBaru = false;
}
private void SimpanFile1() {
PrintWriter pw = null;
try {
pw = new PrintWriter(new BufferedWriter(new FileWriter(file)));
} catch (IOException e) {
msg("Gagal Simpan File : '" + file.getName());
return;
}
pw.print(isi2.getText());
pw.close();
fileBaru1 = false;
}
private void setTitle(String string) {
throw new UnsupportedOperationException("Not yet implemented");
}
class Enskripsimd5 {
private String convertToHex(byte[] data) {
StringBuffer buf = new StringBuffer();
for (int i = 0; i < data.length; i++) {
int halfbyte = (data[i] >>> 4) & 0x0F;
int two_halfs = 0;
do {
if ((0 <= halfbyte) && (halfbyte <= 9)) {
buf.append((char) ('0' + halfbyte));
} else {
buf.append((char) ('a' + (halfbyte - (int) geser.getValue())));
}
halfbyte = data[i] & 0x0F;
} while (two_halfs++ < 1);
}
return buf.toString();
}
public String MD5(String text)
throws NoSuchAlgorithmException, UnsupportedEncodingException {
MessageDigest md;
md = MessageDigest.getInstance("MD5");
byte[] md5hash = new byte[32];
md.update(text.getBytes("iso-8859-1"), 0, text.length());
md5hash = md.digest();
return convertToHex(md5hash);
}
}
4. Klik dua kali pada button browse dan tulis coding:
private void browse2ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
JFileChooser fc = new JFileChooser();
JFrame jf = new JFrame();
int hasil = fc.showOpenDialog(this);
fileBaru = false;
if (hasil == JFileChooser.APPROVE_OPTION) {
file = fc.getSelectedFile();
try {
isi.read(new FileInputStream(file), null);
} catch (IOException e) {
msg("Gagal Buka File : "+file.getName() );
return ;
}
save.setEnabled(true);
btnSaveAs.setEnabled(true);
geser.setEnabled(true);
namafile1.setEnabled(true);
isi.setEnabled(true);
geser.setEnabled(true);
ubah.setEnabled(true);
Cpass.setEnabled(true);
random.setEnabled(true);
password2.setEnabled(true);
File file = fc.getSelectedFile();
text = readFile(file);
isi.setText(text);
namafiletext = file.getPath().toString();
namafile1.setText(namafiletext);
}
fileBaru=false;
}
5. Klik dua kali pada button save pada pada panel atas:
private void saveActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
if (fileBaru) {
btnSaveAs.doClick();
} else {
SimpanFile();
}
}
6. Klik dua kali pada button save as panel atas:
private void btnSaveAsActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
if (fc.showSaveDialog(this) == JFileChooser.APPROVE_OPTION) {
file = fc.getSelectedFile();
if (!file.exists() || okToReplace()) {
SimpanFile();
}
}
}
7. Klik dua kali pada button new panel atas dan tulis codingnya:
private void jButton4ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
save.setEnabled(true);
btnSaveAs.setEnabled(true);
geser.setEnabled(true);
namafile1.setEnabled(true);
isi.setEnabled(true);
geser.setEnabled(true);
ubah.setEnabled(true);
Cpass.setEnabled(true);
random.setEnabled(true);
password2.setEnabled(true);
isi.setText("");
isi2.setText("");
namafile1.setText("");
isi.requestFocus();
fileBaru = true;
}
8. + Klik dua kali pada button keluar:
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
System.exit(0);
}
9. Klik dua kali pada button MD5 panel kiri:
save2.setEnabled(true);
password.setEnabled(true);
pass.setEnabled(true);
isi2.setEnabled(true);
btnSaveAs1.setEnabled(true);
md52.setEnabled(true);
random2.setEnabled(true);
Enskripsimd5 md5 = new Enskripsimd5();
try {
isi2.setText(md5.MD5(isi.getText()));
} catch (NoSuchAlgorithmException ex) {
Logger.getLogger(enskripsi1.class.getName()).log(Level.SEVERE, null, ex);
} catch (UnsupportedEncodingException ex) {
+ Logger.getLogger(enskripsi1.class.getName()).log(Level.SEVERE, null);
}
}
10. Klik dua kali pada button random panel kiri:
private void randomActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
save2.setEnabled(true);
password.setEnabled(true);
pass.setEnabled(true);
isi2.setEnabled(true);
btnSaveAs1.setEnabled(true);
md52.setEnabled(true);
random2.setEnabled(true);
String randomKey = "";
double randomNumber;
for (int i = 0; i < isi.getText().length(); i++) {
randomNumber = Math.random() * 25 + 65;
randomKey = randomKey + (char) randomNumber;
}
isi2.setText(randomKey);
}
11. Klik dua kali pada button password panel kiri:
private void password2ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
if (pass.getText().equals(Cpass.getText())) {
msg("password anda benar : " + Cpass.getText());
isi.setText(isi2.getText());
} else {
msg("password anda salah : " + Cpass.getText());
}
}
12. Klik dua kali pada button save pada panel kanan:
private void save2ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
if (fileBaru1) {
btnSaveAs1.doClick();
} else {
SimpanFile1();
}
}
13. Klik dua kali pada button save as panel kanan:
private void btnSaveAs1ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
if (fc.showSaveDialog(this) == JFileChooser.APPROVE_OPTION) {
file = fc.getSelectedFile();
if (!file.exists() || okToReplace()) {
SimpanFile1();
}
}
}
14. Klik dua kali pada button MD5 panel kanan:
private void md52ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
Enskripsimd5 md5 = new Enskripsimd5();
try {
isi.setText(md5.MD5(isi2.getText()));
} catch (NoSuchAlgorithmException ex) {
Logger.getLogger(enskripsi1.class.getName()).log(Level.SEVERE, null, ex);
} catch (UnsupportedEncodingException ex) {
Logger.getLogger(enskripsi1.class.getName()).log(Level.SEVERE, null);
}
}
15. Klik dua kali pada button random panel kanan:
private void random2ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
String randomKey = "";
double randomNumber;
for (int i = 0; i < isi2.getText().length(); i++) {
randomNumber = Math.random() * 25 + 65;
randomKey = randomKey + (char) randomNumber;
}
isi.setText(randomKey);
}
16. Klik dua kali pada button password panel kanan:
private void passwordActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
if (Cpass.getText().equals(pass.getText())) {
msg("password anda benar : " + pass.getText());
isi2.setText(isi.getText()); } else {
msg("password anda salah : " + pass.getText());
}
}
17. Tulis coding ini di bawah:
private String readFile(File file) {
String result = "";
try {
FileInputStream fis = new FileInputStream(file);
BufferedInputStream bis = new BufferedInputStream(fis);
DataInputStream dis = new DataInputStream(bis);
while (dis.available() != 0) {
result += dis.readLine() + "\n";
}
} catch (FileNotFoundException e) {
} catch (IOException e) {
}
return result;
}
buat class dengan new class dan tulis codingnya:
package enskripsi;
import java.io.File;
import javax.swing.filechooser.FileFilter;
import javax.swing.filechooser.FileFilter;
class jenisFile extends FileFilter {
private String[] s;
jenisFile(String[] sArg) {
s = sArg;
}
// Tentukan file apa yang akan ditampilkan
public boolean accept(File fArg) {
if (fArg.isDirectory())
return true;
for (int i = 0; i < s.length; ++i)
if (fArg.getName().toLowerCase().indexOf(s[i].toLowerCase()) > 0)
return true;
// selain kedua hal di atas, anggap false
return false;
}
public String getDescription() {
String tmp = "";
for (int i = 0; i < s.length; ++i)
tmp += "*" + s[i] + " ";
return tmp;
}
}
buat class dengan new class dan tulis codingnya:
package enskripsi;
import java.io.File;
import javax.swing.filechooser.FileFilter;
import javax.swing.filechooser.FileFilter;
class jenisFile extends FileFilter {
private String[] s;
jenisFile(String[] sArg) {
s = sArg;
}
// Tentukan file apa yang akan ditampilkan
public boolean accept(File fArg) {
if (fArg.isDirectory())
return true;
for (int i = 0; i < s.length; ++i)
if (fArg.getName().toLowerCase().indexOf(s[i].toLowerCase()) > 0)
return true;
// selain kedua hal di atas, anggap false
return false;
}
public String getDescription() {
String tmp = "";
for (int i = 0; i < s.length; ++i)
tmp += "*" + s[i] + " ";
return tmp;
}
}
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