Thread: How can I modify a text so that it doesn't contain two equal numbers?

I would like to create a program that takes some files and modifies them in this way:
The files should contain text formatted in this way:

##############
#various comments#
##############
something{
    identifier=1234
    anotherIdentifier=1235
    anotherOne=12345
    //and so on...
}//I need only this
 
#Comments are sometimes made this way
 
somethingAgain{
 
    #comments that explains what's below them
    I:dentifier:something, I, do, not, need
 
    #see ^that
    A:notherIdentifier:boolean
 
    //and so on..
}

and I have to make so that the numbers contained in something{} in all the files don't match.

I could ask to make so that the input file is only one, and it is formatted this way:

identifier=1234
anotherIdentifier=1235
anotherOne=12345
//and so on...

but I don't know how to do the rest of the program...
That's what I've done (the names of the classes, package etc. are in Italian and there's some useless code that NetBeans prevents me from deleting):

package confronto;
 
import java.awt.Color;
import java.io.*;
import javax.swing.*;
 
/**
 *
 * @author Oxen Eknat
 */
public class confrontoTesti extends javax.swing.JFrame {
 
    /**
     * Creates new form confrontoTesti
     */
    public confrontoTesti() {
        initComponents();
    }
 
    /**
     *
     * @param percorsoIniziale is the string that contains the folder of the unedited file
     * @param percorsoFinale is the string that contains the folder where the edited file will be put in
     */
    public static void modificaTesto (String percorsoIniziale, String percorsoFinale){
        try{
            FileReader f= new FileReader(percorsoIniziale);
            String a=f.toString();
            int l = a.length();
            for (int i=0; i<l; i++){
                char c1 = a.charAt(i);
                String n = "";
                if (c1=='1'|c1=='2'|c1=='3'|c1=='4'|c1=='5'|c1=='6'|c1=='7'|c1=='8'|c1=='9'|c1=='0'){
                    do{
                    n += c1;
                    i++;
                    c1 = a.charAt(i);
                    } while (c1=='1'|c1=='2'|c1=='3'|c1=='4'|c1=='5'|c1=='6'|c1=='7'|c1=='8'|c1=='9'|c1=='0');
                }
                int n1 = Integer.getInteger(n);
                try{
                    try (PrintWriter writer = new PrintWriter(percorsoFinale, "UTF-8")) {
                        writer.println(n1);
                    }
                }
                catch(FileNotFoundException | UnsupportedEncodingException errore1){
                    JOptionPane.showMessageDialog(null,"Errore imprevisto! Errore:" + errore1 ,"ERRORE!",JOptionPane.ERROR_MESSAGE);
                }
            }
        }
        catch(FileNotFoundException errore){
            JOptionPane.showMessageDialog(null,"Errore imprevisto! Errore:" + errore ,"ERRORE!",JOptionPane.ERROR_MESSAGE);
        }
    }
 
    /**
     * 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() {
 
        jTextField2 = new javax.swing.JTextField();
        jTextField1 = new javax.swing.JTextField();
        jButton1 = new javax.swing.JButton();
        jTextField3 = new javax.swing.JTextField();
        jButton2 = new javax.swing.JButton();
 
        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
 
        jTextField2.setEditable(false);
        jTextField2.setFont(new java.awt.Font("Times New Roman", 0, 24)); // NOI18N
        jTextField2.setHorizontalAlignment(javax.swing.JTextField.CENTER);
        jTextField2.setText("CONFRONTO");
        jTextField2.setBorder(null);
        jTextField2.setCursor(new java.awt.Cursor(java.awt.Cursor.DEFAULT_CURSOR));
        jTextField2.setFocusable(false);
        jTextField2.setHighlighter(null);
        jTextField2.setOpaque(false);
        jTextField2.setSelectedTextColor(new java.awt.Color(0, 0, 0));
        jTextField2.setSelectionColor(new java.awt.Color(240, 240, 240));
 
        jTextField1.setFont(new java.awt.Font("Tahoma", 2, 11)); // NOI18N
        jTextField1.setText("percorso del file");
        jTextField1.setCursor(new java.awt.Cursor(java.awt.Cursor.TEXT_CURSOR));
        jTextField1.addMouseListener(new java.awt.event.MouseAdapter() {
            public void mouseClicked(java.awt.event.MouseEvent evt) {
                jTextField1MouseClicked(evt);
            }
            public void mouseEntered(java.awt.event.MouseEvent evt) {
                jTextField1MouseEntered(evt);
            }
        });
        jTextField1.addKeyListener(new java.awt.event.KeyAdapter() {
            public void keyPressed(java.awt.event.KeyEvent evt) {
                jTextField1KeyPressed(evt);
            }
        });
 
        jButton1.setText("Verifica!");
        jButton1.setToolTipText("");
        jButton1.addMouseListener(new java.awt.event.MouseAdapter() {
            public void mouseClicked(java.awt.event.MouseEvent evt) {
                jButton1MouseClicked(evt);
            }
        });
 
        jTextField3.setFont(new java.awt.Font("Tahoma", 2, 11)); // NOI18N
        jTextField3.setText("percorso del nuovo file");
        jTextField3.setCursor(new java.awt.Cursor(java.awt.Cursor.TEXT_CURSOR));
        jTextField3.addMouseListener(new java.awt.event.MouseAdapter() {
            public void mouseClicked(java.awt.event.MouseEvent evt) {
                jTextField3MouseClicked(evt);
            }
            public void mouseEntered(java.awt.event.MouseEvent evt) {
                jTextField3MouseEntered(evt);
            }
        });
        jTextField3.addKeyListener(new java.awt.event.KeyAdapter() {
            public void keyPressed(java.awt.event.KeyEvent evt) {
                jTextField3KeyPressed(evt);
            }
        });
 
        jButton2.setText("Crea il nuovo file!");
        jButton2.addMouseListener(new java.awt.event.MouseAdapter() {
            public void mouseClicked(java.awt.event.MouseEvent evt) {
                jButton2MouseClicked(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(jButton2, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                    .addComponent(jButton1, javax.swing.GroupLayout.Alignment.TRAILING, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
                    .addComponent(jTextField2, javax.swing.GroupLayout.DEFAULT_SIZE, 380, Short.MAX_VALUE)
                    .addComponent(jTextField1)
                    .addComponent(jTextField3))
                .addContainerGap())
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addGroup(layout.createSequentialGroup()
                .addGap(19, 19, 19)
                .addComponent(jTextField2, javax.swing.GroupLayout.PREFERRED_SIZE, 42, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
                .addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(jButton1)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(jTextField3, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
                .addComponent(jButton2, javax.swing.GroupLayout.PREFERRED_SIZE, 82, javax.swing.GroupLayout.PREFERRED_SIZE)
                .addGap(65, 65, 65))
        );
 
        pack();
    }// </editor-fold>                        
 
    private void jTextField1MouseClicked(java.awt.event.MouseEvent evt) {                                         
        jTextField1.setFont(new java.awt.Font("Tahoma", 0, 11)); 
        jTextField1.setForeground(Color.black);
        jTextField1.setText("");
    }                                        
 
    private void jTextField1KeyPressed(java.awt.event.KeyEvent evt) {                                       
    }                                      
 
    private void jTextField1MouseEntered(java.awt.event.MouseEvent evt) {                                         
    }                                        
 
    private void jButton1MouseClicked(java.awt.event.MouseEvent evt) {                                      
        String percorso;
        percorso=jTextField1.getText();
        try {
            FileReader f= new FileReader(percorso);
        }
        catch (FileNotFoundException errore){
            jTextField1.setFont(new java.awt.Font("Tahoma", 2, 11));
            jTextField1.setForeground(Color.red);
            jTextField1.setText("Errore: percorso non valido");
        }
    }                                     
 
    private void jTextField3MouseClicked(java.awt.event.MouseEvent evt) {                                         
        jTextField3.setFont(new java.awt.Font("Tahoma", 0, 11)); 
        jTextField3.setForeground(Color.black);
        jTextField3.setText("");
    }                                        
 
    private void jTextField3MouseEntered(java.awt.event.MouseEvent evt) {                                         
        // TODO add your handling code here:
    }                                        
 
    private void jTextField3KeyPressed(java.awt.event.KeyEvent evt) {                                       
        // TODO add your handling code here:
    }                                      
 
    private void jButton2MouseClicked(java.awt.event.MouseEvent evt) {                                      
        String percorsoIniziale=jTextField1.getText();
        String percorsoFinale=jTextField3.getText();
        modificaTesto (percorsoIniziale, percorsoFinale);
    }                                     
 
    /**
     * @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 [url=http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html]How to Set the Look and Feel (The Java™ Tutorials > Creating a GUI With JFC/Swing > Modifying the Look and Feel)[/url] 
         */
        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(confrontoTesti.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(confrontoTesti.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(confrontoTesti.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(confrontoTesti.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }
        //</editor-fold>
 
        /* Create and display the form */
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new confrontoTesti().setVisible(true);
            }
        });
    }
 
    // Variables declaration - do not modify                     
    private javax.swing.JButton jButton1;
    private javax.swing.JButton jButton2;
    private javax.swing.JTextField jTextField1;
    private javax.swing.JTextField jTextField2;
    private javax.swing.JTextField jTextField3;
    // End of variables declaration                   
}

For the first version of the program I would not use any GUI. Write a console program that reads the file, parses the lines and saves the numeric parts for comparison against future lines. Save each line in a list that will be used to write out the updated version of the file. When a match is found, change the number part of the line before saving it in the list.

Thanks, I'll try this as soon as I can (now it's kinda late, 23:45 :P)