Code is proper but results are unexpected

Question

hi all!!
i am really facing trouble with this code since i can't understand why results are not as expected..
let me briefly describe my problem:
1.whenever i click on this default selected item for the first time ,its not selected and nothing is displayed.
2.when i click on split option window of other option i.e rename is popped up.
3.sometimes 2 windows are popped up when we select particular option...1of the other option and one of the current option.
4.since i can't send whole code i have selected 2 files 1 of GUI which is for split option and remaining all option have same class defined which is rename.in actual when all options have different classes still i face the same problem.
5.front is my main class in which both these classes are called.
import java.io.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.filechooser.*;
public class front extends JFrame
      private JRadioButton split,zip,rename,unzip;
         private ButtonGroup radioGroup;
      public front()
      Container c = getContentPane();
         c.setLayout(new  GridLayout(0,1)); 
      c.setBackground(Color. cyan);
      setSize(530,120);
      setResizable(false); // to disable  the maximize  button 
         c.add( new Label("Choose the operation to be done :"));
         ImageIcon ii= new ImageIcon("split.jpg");
         split=new JRadioButton("Splitter",ii,true);
         split.setBackground(Color.cyan);
      ImageIcon ij= new ImageIcon("zip.jpg");
         zip=new JRadioButton("Zipper",ij,false);
         zip.setBackground(Color.cyan);
      ImageIcon ik= new ImageIcon("rename.jpg");
         rename=new JRadioButton("Rename all",ik,false);
      rename.setBackground(Color.cyan);
      ImageIcon il= new ImageIcon("copymail.jpg");
         unzip=new JRadioButton("unzip",il,false);
         unzip.setBackground(Color.cyan);
         RadioButtonHandler handler = new RadioButtonHandler();
          split.addItemListener( handler );
         zip.addItemListener( handler );
      rename.addItemListener( handler );
         unzip.addItemListener( handler );     
         c.add (split);
         c.add(zip);
         c.add(unzip);
         c.add(rename);
  // create logical relationship between JRadioButtons
      radioGroup = new ButtonGroup();
         radioGroup.add(split );
         radioGroup.add( zip);
         radioGroup.add(rename );
         radioGroup.add( unzip);
      //  setPosition(250,250);
         setSize(300,500);
         setVisible(true);
private class RadioButtonHandler implements ItemListener
      public void itemStateChanged( ItemEvent e )
                  if ( e.getSource() == split)
                 Gui file = new Gui();
                  if ( e.getSource() == zip)
            rename file= new rename();
          if ( e.getSource() == rename)
                   rename file= new rename();
             if ( e.getSource() ==unzip)
                    rename file= new rename();
   public static void main(String args[])
              front f=new front();
              f.addWindowListener(
                   new WindowAdapter() {
                        public void windowClosing(WindowEvent e)
                             System.exit(0);
  }

Answer 1

import java.io.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.filechooser.*;
import javax.swing.text.*;
import javax.swing.event.*;
import java.io.*;
public class Gui extends JFrame
     private JButton splitbutton,joinbutton,ok;
     public JTextField at ,text2;
     private JRadioButton num,size;
     private ButtonGroup radioGroup;
     public JTextField text1;
     public File file;
     public JFileChooser choose;
     public static String name;
     public static int check=0;
     public static long  no,no2;
public Gui()
{     super("FILE SPLITTER");
     Container c= getContentPane();
     c.setLayout(new FlowLayout());
     splitbutton= new JButton(" SPLIT");
     joinbutton = new JButton("JOIN");
     num=new JRadioButton(" NUMBER");
     size=  new JRadioButton("SIZE");
     text1=new JTextField(20);
     text2=new JTextField(20);
     at=new JTextField(20);
     ok = new JButton("ok");
     c.add(ok);
       num.enable(false);
       size.enable(false);
       text1.enable(false);
       text2.enable(false);
       at.enable(true);
       c.add(at);
       c.add(text1);
       c.add(text2);
       c.add(splitbutton);
       c.add(joinbutton);
       c.add(num);
       c.add(size);
      radioGroup= new ButtonGroup();
      radioGroup.add(num);
      radioGroup.add(size);
      setSize(350,100); show();
      splitbutton .addActionListener (
      new ActionListener(){
      public void actionPerformed(ActionEvent e)
        saved();
        num.enable(true);
        size.enable(true);
      ok.addActionListener (
      new ActionListener(){
      public void actionPerformed(ActionEvent e)
      {    String siz,path;
            long k;
            if(check==3)
             path=smr(name);
             join(path);
            if(check==1)
            siz=text1.getText();
            no=Integer.parseInt(siz);
            k=no2/no;
            split1(name,k);
          else 
            if (check==2)
                 siz=text2.getText();
                no=Integer.parseInt(siz);
                 split1(name,no);
      num.addActionListener (
      new ActionListener(){
      public void actionPerformed(ActionEvent e)
           text2.enable(false);
           text1.enable(true);
            check=1;
      size.addActionListener (
      new ActionListener(){
      public void actionPerformed(ActionEvent e)
           text1.enable(false);
            text2.enable(true);
            check=2;
     joinbutton.addActionListener (
      new ActionListener(){
      public void actionPerformed(ActionEvent e)
      {      check=3;
            saved();
            splitbutton.enable(false);
     public void saved()
     choose = new JFileChooser();
              int result = choose.showOpenDialog( this );
      // user clicked Cancel button on dialog
      if ( result == choose.CANCEL_OPTION )
         return;
       else
           file= choose.getSelectedFile();
           name = file.getPath();
           no2= file.length();
           at.setText(name);
       public String smr(String input)
       String out=new String("");
        int i=0,j=0;
       int temp=0;
       char a[];
       i=input.length ();
       a= input.toCharArray ();
       for(j=0;j<i;j++)
          if(a[j]=='1')
            a[j]='\0';
            break;
          else
            out = out+a[j];
         return out;
          public void join(String FilePath)
          long leninfile=0,leng=0;
          int count=1,data=0;
          try
               File filename=new File(FilePath);
               RandomAccessFile outfile = new RandomAccessFile(filename,"rw");
               while(true)
                    filename=new File(FilePath + count + ".sp");
                    if (filename.exists())
                         RandomAccessFile infile = new RandomAccessFile(filename,"r");
                         data=infile.read();
                         while(data!=-1)
                              outfile.write(data);
                              data=infile.read();
                         leng++;
                         infile.close();
                         count++;
                    else
                         break;
               outfile.close();
          catch(Exception e)
               e.printStackTrace();
     public static void main(String args[])
         {          Gui dd=new Gui();
                            dd.addWindowListener(
                   new WindowAdapter() {
                        public void windowClosing(WindowEvent e)
                             System.exit(0);
     public void split1(String FilePath,long splitlen)
          long leninfile=0,leng=0;
          int count=1,data;
          try
               File filename=new File(FilePath);
               RandomAccessFile infile = new RandomAccessFile(filename,"r");
               data=infile.read();
               while(data!=-1)
                    filename=new File(FilePath + count + ".sp");
                    RandomAccessFile outfile = new RandomAccessFile(filename,"rw");
                    while( data!=-1 && leng<splitlen)
                         outfile.write(data);
                         leng++;
                         data=infile.read();
                    leninfile+=leng;
                    leng=0;
                    outfile.close();
                    count++;
          catch(Exception e)
               e.printStackTrace();
}