Want to stop for opening multiple frames ????

Question

Dear i am working on an application .
in that there is a frame ok in that frame there is a button.
so when u click on that button a new frame will open ok now the problem is that.
suppose u click 5 times on that button so that button will open 5 same type of frames.
so i dont want to open more then 1 frame so pl help me .i cant find out how to stop to open more then 1 frame.
here is a code of 1st frame . which have a button ok
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.border.*;
public class bookdata implements ActionListener
     JFrame frame;
     JLabel label;
     JPanel panel , panel2 , panel3;
     JButton but1,but2,but3,but4,but5,but6;
     Color cc;
     BoxLayout bak;
     ImageIcon icon;
     FlowLayout flo;
     public bookdata()
          icon = new ImageIcon("book/book.jpg");
          frame = new JFrame("Book Database");
          //frame.setResizable(false);
          frame.setIconImage(new ImageIcon("book/logo.gif").getImage());
          Dimension d = Toolkit.getDefaultToolkit().getScreenSize();
          int x = (d.width - 550)/2;
          int y = (d.height - 500)/2;
          frame.setBounds(x,y,400,300);
     public void main1()
          JLabel label = new JLabel(icon);
          flo = new FlowLayout();
          panel3 = new JPanel();
          but1 = new JButton("NEW BOOK");
          but2 = new JButton("EDIT");
          but3 = new JButton("DELET");
          but4 = new JButton("SHOW");
          but5 = new JButton("LONE");
          but6 = new JButton();
          but1.addActionListener(this);
          panel = new JPanel();
          bak = new BoxLayout(panel,BoxLayout.Y_AXIS);
          panel.setLayout(bak);
          // 1st 220 is for R
          // 2nd 177 is for G
          // 3rd 162 is for B
          // 4th 255 is for Alpha
          cc = new Color(51,51,255);
          panel2 = new JPanel();
          panel2.setLayout(flo);
          panel2.setBackground(cc);
          panel2.add(label);
          JSeparator hh = new JSeparator(SwingConstants.VERTICAL);
          SpringLayout layout = new SpringLayout();
          panel3.setLayout(layout);
          panel3.add(but1);          // pp1
          panel3.add(but2);          // pp2
          panel3.add(but3);          // pp3
          panel3.add(but4);          // pp4
          panel3.add(but5);          // pp5
          //ActionListenet Calling
          layout.putConstraint(SpringLayout.WEST,  but1, 15,SpringLayout.WEST,  panel3);          // pp1
         layout.putConstraint(SpringLayout.NORTH, but1, 25,SpringLayout.NORTH, panel3);
          layout.putConstraint(SpringLayout.WEST,  but2, 15,SpringLayout.WEST,  panel3);          // pp2
         layout.putConstraint(SpringLayout.NORTH, but2, 55,SpringLayout.NORTH, panel3);
          layout.putConstraint(SpringLayout.WEST,  but3, 15,SpringLayout.WEST,  panel3);          // pp3
         layout.putConstraint(SpringLayout.NORTH, but3, 85,SpringLayout.NORTH, panel3);
          layout.putConstraint(SpringLayout.WEST,  but4, 15,SpringLayout.WEST,  panel3);          // pp4
         layout.putConstraint(SpringLayout.NORTH, but4, 115,SpringLayout.NORTH, panel3);
          layout.putConstraint(SpringLayout.WEST,  but5, 15,SpringLayout.WEST,  panel3);          // pp5
         layout.putConstraint(SpringLayout.NORTH, but5, 145,SpringLayout.NORTH, panel3);
          layout.putConstraint(SpringLayout.WEST,  label, 60,SpringLayout.WEST,  panel3);
         layout.putConstraint(SpringLayout.NORTH, label, 100,SpringLayout.NORTH, panel3);
          frame.getContentPane().add(panel);
          panel.add(panel2);
          panel.add(panel3);
          frame.setSize(600,500);
          frame.setVisible(true);
          frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
     public void actionPerformed(ActionEvent e)
          Object obj = e.getSource();
          if(obj == but1)
               newbook nebook = new newbook();
}

Answer 1

Dear i am working on an application .
in that there is a frame ok in that frame there is a
button.
so when u click on that button a new frame will open
ok now the problem is that.
suppose u click 5 times on that button so that button
will open 5 same type of frames.
DO U WANT TO COME AGAIN ON THE PARENT FRAME.IF NOT THAN
parentFrame.setVisible(false);
if yes then ................
so i dont want to open more then 1 frame so pl help
p me .i cant find out how to stop to open more then 1
frame.
here is a code of 1st frame . which have a button
ok
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.border.*;
public class bookdata implements ActionListener
     JFrame frame;
     JLabel label;
     JPanel panel , panel2 , panel3;
     JButton but1,but2,but3,but4,but5,but6;
     Color cc;
     BoxLayout bak;
     ImageIcon icon;
     FlowLayout flo;
     public bookdata()
          icon = new ImageIcon("book/book.jpg");
          frame = new JFrame("Book Database");
          //frame.setResizable(false);
frame.setIconImage(new
ew ImageIcon("book/logo.gif").getImage());
Dimension d =
= Toolkit.getDefaultToolkit().getScreenSize();
          int x = (d.width - 550)/2;
          int y = (d.height - 500)/2;
          frame.setBounds(x,y,400,300);
     public void main1()
          JLabel label = new JLabel(icon);
          flo = new FlowLayout();
          panel3 = new JPanel();
          but1 = new JButton("NEW BOOK");
          but2 = new JButton("EDIT");
          but3 = new JButton("DELET");
          but4 = new JButton("SHOW");
          but5 = new JButton("LONE");
          but6 = new JButton();
          but1.addActionListener(this);
          panel = new JPanel();
          bak = new BoxLayout(panel,BoxLayout.Y_AXIS);
          panel.setLayout(bak);
          // 1st 220 is for R
          // 2nd 177 is for G
          // 3rd 162 is for B
          // 4th 255 is for Alpha
          cc = new Color(51,51,255);
          panel2 = new JPanel();
          panel2.setLayout(flo);
          panel2.setBackground(cc);
          panel2.add(label);
JSeparator hh = new
ew JSeparator(SwingConstants.VERTICAL);
          SpringLayout layout = new SpringLayout();
          panel3.setLayout(layout);
          panel3.add(but1);          // pp1
          panel3.add(but2);          // pp2
          panel3.add(but3);          // pp3
          panel3.add(but4);          // pp4
          panel3.add(but5);          // pp5
          //ActionListenet Calling
layout.putConstraint(SpringLayout.WEST,  but1,
1, 15,SpringLayout.WEST,  panel3);          // pp1
layout.putConstraint(SpringLayout.NORTH, but1,
but1, 25,SpringLayout.NORTH, panel3);
layout.putConstraint(SpringLayout.WEST,  but2,
2, 15,SpringLayout.WEST,  panel3);          // pp2
layout.putConstraint(SpringLayout.NORTH, but2,
but2, 55,SpringLayout.NORTH, panel3);
layout.putConstraint(SpringLayout.WEST,  but3,
3, 15,SpringLayout.WEST,  panel3);          // pp3
layout.putConstraint(SpringLayout.NORTH, but3,
but3, 85,SpringLayout.NORTH, panel3);
layout.putConstraint(SpringLayout.WEST,  but4,
4, 15,SpringLayout.WEST,  panel3);          // pp4
layout.putConstraint(SpringLayout.NORTH, but4,
but4, 115,SpringLayout.NORTH, panel3);
layout.putConstraint(SpringLayout.WEST,  but5,
5, 15,SpringLayout.WEST,  panel3);          // pp5
layout.putConstraint(SpringLayout.NORTH, but5,
but5, 145,SpringLayout.NORTH, panel3);
layout.putConstraint(SpringLayout.WEST,  label,
l, 60,SpringLayout.WEST,  panel3);
layout.putConstraint(SpringLayout.NORTH, label,
abel, 100,SpringLayout.NORTH, panel3);
          frame.getContentPane().add(panel);
          panel.add(panel2);
          panel.add(panel3);
          frame.setSize(600,500);
          frame.setVisible(true);
          frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE)
     public void actionPerformed(ActionEvent e)
          Object obj = e.getSource();
          if(obj == but1)
               newbook nebook = new newbook();