I have a main.java file containing the main class and multiple functions along with main function. I have imported a user defined package containing GUI.java file. The GUI has 3 text feilds and 3 buttons. I want to take the inputs from the text feilds and send them for processing to main.java file if button A or B is pressed on the GUI. I have added action listeners. How can this be achieved?
Below one is main java file:
import com.cryptogui.GUI;
import javax.swing.*;
import java.io.*;
import java.util.*;
import com.cryptogui.*;
public class Test{
//function to convert ascii values to integer values
private static int convInt(char ascii)
{
int intVal;
if ((ascii >= 'a') && (ascii <= 'z'))
{
intVal = (int) ascii;
intVal = intVal - 97;
}
else
{
intVal = (int) ascii;
intVal = intVal - 65;
}
return (intVal);
}
//function to encrypt and decrypt the letter using 'Vigenere Cipher'
private static char encOrDec(char let, char keyLet, int fl)
{
int intLet, intKeyLet;
intLet = convInt(let);
intKeyLet = convInt(keyLet);
//condition to check whether to to encrypt or decrypt if fl=0 -> Encryption; fl=1 -> Decryption
if (fl == 0)
{
intLet = Math.floorMod((intLet + intKeyLet), 26);
}
else
{
intLet = Math.floorMod((intLet - intKeyLet), 26);
}
//converts int values 0-25 into ascii values for 'a'-'z' OR converts int values 0-25 into ascii values for 'A'-'Z'
if ((let >= 'a') && (let <= 'z'))
{
let = (char) (intLet + 97);
}
else
{
let = (char) (intLet + 65);
}
return (let);
}
//function to break the the current line into characters and put them back together after encryption or decryption
private static String encLine(String str, String key, int flag)
{
int i = 0, j = 0;
char buffer;
char keyBuf;
String cipherText = "";
int len = str.length();
int len2 = key.length();
//loop to encrypt or decrypt the line, character by character
while (i < len)
{
buffer = str.charAt(i);
//condition to check if character is a Letter
if (((buffer >= 'A') && (buffer <= 'Z')) || ((buffer >= 'a') && (buffer <= 'z')))
{
//condition to make sure the key word keeps repeating itself
if (j >= len2)
{
j = 0;
}
keyBuf = key.charAt(j);
//character and corresponding keyword character are sent to get encrypted or decrypted
buffer = encOrDec(buffer, keyBuf, flag);
j++;
}
//cipher text is created by appending char by char
cipherText += buffer;
i++;
}
return (cipherText);
}
//function to copy file
private static void copyFile(String readFile, String writeFile)
{
String copyLine = null;
try
{
FileReader filereader = new FileReader(readFile);
BufferedReader bufferedReader = new BufferedReader(filereader);
FileWriter fileWriter = new FileWriter(writeFile);
BufferedWriter bufferedWriter = new BufferedWriter(fileWriter);
while ((copyLine = bufferedReader.readLine()) != null)
{
bufferedWriter.write(copyLine);
bufferedWriter.newLine();
}
bufferedReader.close();
bufferedWriter.close();
}
catch (FileNotFoundException ex)
{
System.out.println("Unable to open file '" + readFile + "'\n");
}
catch (IOException ex)
{
System.out.println("Error during copying file\n");
}
}
public static void main(String args[])
{
GUI mainframe = new GUI();
mainframe.init();
String fileRead, fileWrite, tempFile, keyWord;
Scanner sc = new Scanner(System.in);
File f = null;
int flag = mainframe.flag;
while (flag != 2)
{
//System.out.println("\nEnter '0' to encrypt, '1' to decrypt OR '2' to quit");
//flag = sc.nextInt();
//sc.nextLine();
if (flag > 2)
{
flag = 2;
}
if ((flag == 0) || (flag == 1))
{
//System.out.println("Enter file path of the file to be read");
fileRead = mainframe.sourceText;
//System.out.println("\nEnter file path of the file to be written");
fileWrite = mainframe.destText;
//System.out.println("\nEnter KeyWord (keyword must not have special character,numbers,whitespaces)");
keyWord = mainframe.keyText;
String line = null;
tempFile = fileWrite;
//block to create temp file in case we to read and write in the same file
if (fileRead.equals(fileWrite))
{
f = new File("tempf.txt");
fileWrite = "tempf.txt";
}
try
{
FileReader filereader = new FileReader(fileRead);
BufferedReader bufferedReader = new BufferedReader(filereader);
FileWriter fileWriter = new FileWriter(fileWrite);
BufferedWriter bufferedWriter = new BufferedWriter(fileWriter);
//block to read file line by line and encrypt or decrypt it and write it another file
while ((line = bufferedReader.readLine()) != null)
{
line = encLine(line, keyWord, flag);
bufferedWriter.write(line);
bufferedWriter.newLine();
}
bufferedReader.close();
bufferedWriter.close();
}
catch (FileNotFoundException ex)
{
mainframe.errorDialogue(0);
//System.out.println("Unable to open file '" + fileRead + "'\n");
}
catch (IOException ex)
{
mainframe.errorDialogue(1);
//System.out.println("Error reading '" + fileRead + "' or writing '" + fileWrite + "' file \n");
}
if (fileRead.equals(tempFile))
{
//copies file from temp file to the original file if we have to source and dest are the same file
copyFile(fileWrite, tempFile);
//temp file is deleted after the process
f.delete();
}
//System.out.println("File has been processed successfully. Enter one of the options from below:\n");
}
}
//System.out.println("Thank for using\n");
}
}
this one is gui java file
package com.cryptogui;
import javax.swing.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
public class GUI {
public JPanel main;
private JTextField destFeild;
private JPasswordField keywordPFeild;
private JButton encryptButton;
private JButton decryptButton;
private JLabel sourceLabel;
private JTextField sourceFeild;
private JSplitPane sourcePane;
private JSplitPane destPane;
private JLabel destLabel;
private JSplitPane keywordPane;
private JLabel keywordLabel;
private JSplitPane buttonPane;
private JButton cancelButton;
public String sourceText;
public String destText;
public String keyText;
public int flag = 10;
public GUI() {
encryptButton.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
flag = 0;
sourceText = sourceFeild.getText();
destText = destFeild.getText();
keyText = new String(keywordPFeild.getPassword());
JOptionPane.showMessageDialog(null,"Encryption completed");
}
});
decryptButton.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
flag = 1;
sourceText = sourceFeild.getText();
destText = destFeild.getText();
keyText = new String(keywordPFeild.getPassword());
JOptionPane.showMessageDialog(null,"Decryption completed");
}
});
cancelButton.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
System.exit(0);
}
});
}
public void init(){
JFrame frame = new JFrame("GUI");
frame.setContentPane(new GUI().main);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.pack();
frame.setSize(600,300);
frame.setLocation(700,350);
frame.setVisible(true);
}
public void errorDialogue(int x){
if (x == 0)
{
JOptionPane.showMessageDialog(null,"Unable to open SOURCE FILE");
}
else if (x == 1)
{
JOptionPane.showMessageDialog(null,"Error occurred while reading SOURCE FILE or writing DEST FILE");
}
}
}
