Scrollbar for jtable

[janavi patel]

hello friends..

Please tell me how to add vertical and horizantal scrollbar in jtable?

[Maneesh Godbole]

panel.add(new JScrollPane(table));

Swing related. Moving.

[janavi patel]

Thanks for reply...

but I already tried everything......and nothing is helpful for me........

[Maneesh Godbole]

Does the panel to which you are adding the table, has a BorderLayout?
It will help us help you better if you tell the details
Also check out this link on how to get the most out of the Ranch.

[Rob Spoor]

Then you're definitely doing something wrong, because the code Maneesh provided should do just what you need.

Can you show the bit of your code where you add your table to its parent?

[Michael Dunn]

> but I already tried everything......and nothing is helpful for me........

then you're possibly using a null layout, and not giving anything a size.

we can continue to play 20 guesses, or, if you really want a solution, post your code.

[Rohit Aggarawal]

Use this. It will work ..

JScrollPane scrollPane = new JScrollPane(instance_of_Table);
scrollPane.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_ALWAYS);
scrollPane.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_ALWAYS);
add(scrollPane, BorderLayout.CENTER); (Add should be called for any container....FRame or JPAnel)

[Rohit Aggarawal]

Or send me your code...

[Maneesh Godbole]

Rohit,
Please read this: http://faq.javaranch.com/java/UseTheForumNotEmail

[janavi patel]

here is my code

class UserPasswardMaster
{
	public static void main(String args[])
	{
		try{
			String Username = "";
			String Password = "";
						
			MyFrame8 f8 = new MyFrame8(Username,Password);			
			f8.setSize(500,350);
			f8.show();
		}catch (Exception e){
			System.out.println("Exception in MyFrame8 is ==>"+e);
		}
	}
}

class MyFrame8 extends JFrame
{
	JPanel p,p1;
	Container c;
	JTable table;
	JTableHeader header;
	DefaultTableModel model;
	JScrollPane pane;

	public MyFrame8(String Username,String Password)   //Constructor
	{
			c = getContentPane();
			p = new JPanel();
			p.setLayout(null);
			p1 = new JPanel();
			p1.setLayout(new BorderLayout());
			
			String data[][] = {};
			String col[] = {"Username","Password"};

			model = new DefaultTableModel(data, col);			
			table = new JTable(model)
			{
				public boolean isCellEditable(int rowIndex,int colIndex){
				return false;
			}};
	
			header = table.getTableHeader();
			pane = new JScrollPane(table);

			p1.add(header);
			p1.add(table);
			p1.add(pane);
			
			p.add(p1);
			c.add(p);
	
	}   //Constructor End
}    

[Rohit Aggarawal]

Ok. I got it...

[Maneesh Godbole]

p.setLayout(null);  //Bad idea to set the layout to null. Why are you doing it
p1.add(header);  //1
p1.add(table);  //2
p1.add(pane);  //3 If you do not define the constraints, it defaults to center. Only 1 component can be added. So you end up with the pane
p.add(p1);  
c.add(p);  

Please see my comments.
Recommendations:
1) You do not need p. Discard it.
2) Use p1.add(scrollPane)
3) Use c.add(p1)
4) Even, c.add(scrollPane) will do, if your UI shows only the table.

Recommended reading
http://java.sun.com/docs/books/tutorial/uiswing/components/frame.html
http://java.sun.com/docs/books/tutorial/uiswing/layout/using.html

[janavi patel]

I tried this code but this is also not working.....

JScrollPane scrollPane = new JScrollPane(instance_of_Table); 
scrollPane.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_ALWAYS); 
scrollPane.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_ALWAYS); 
add(scrollPane, BorderLayout.CENTER); (Add should be called for any container....FRame or JPAnel) 

[janavi patel]

Thanks Manish

but i tried that one also. when i use BorderLayout() it shows empty frame and nothing in it...

i really fade up of this problem....

[Dany Rouss]

[MG]Edited to remove hijack.

Danny,
Welcome to the Ranch.
Please start a new thread for your question.

[Maneesh Godbole]

janavi patel wrote:
but i tried that one also. when i use BorderLayout() it shows empty frame and nothing in it...

Like you have been told before, unless you show us your code, we cannot really help you..and even people will get fed up and stop helping you.
So, show us your code

[Vandre Caetano]

I changed a few things in the code, here is one that works:

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.DefaultTableModel;

public class UserPasswardMaster {
	public static void main(String args[]) {
		try {
			String username = "Username";  
			String password = "Password";  
			MyFrame8 frame8 = new MyFrame8(username, password);
			frame8.setSize(500, 350);
			frame8.setVisible(true);
		} catch (Exception e) {
			System.out.println("Exception in MyFrame8 is ==>" + e);
		}
	}
}

class MyFrame8 extends JFrame {
	private JPanel mainPanel;
	private JTable table;
	private JScrollPane pane;

	public MyFrame8(String username, String password) {
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		mainPanel = new JPanel();

		String data[][] = {};
		String col[] = { username, password };

		table = new JTable();
		DefaultTableModel dtm = new DefaultTableModel(data, col);
		table.setModel(dtm);
		pane = new JScrollPane(table);
		mainPanel.add(pane);

		add(mainPanel);

	} // Constructor End
}
 

I thing you mixed up a few things like:
# p1.add(header);
# p1.add(table);
# p1.add(pane);
you use this only when there is no scrollpane in the table: http://java.sun.com/docs/books/tutorial/uiswing/components/table.html

I hope it helps

[janavi patel]

Here is my another code....

//Write a program that demonstrate jdbc with awt(Inventory)

package components;

import java.io.*;
import java.lang.*;
import java.util.*;
import javax.swing.*;
import javax.swing.JInternalFrame;
import javax.swing.table.*;
import javax.swing.table.DefaultTableModel.*;
import java.awt.*;
import java.awt.event.*;
import java.sql.*;
import javax.sql.*;
import javax.swing.JScrollBar.*;

public class UOMMaster  extends JFrame implements MouseListener
{
	JLabel l1,l2;
	JTextField t1,t2;	
	JPanel p;
	Container c;

	JScrollBar pane1;
	//JScrollPane pane1;

	JTable table;
	JTableHeader header;
	DefaultTableModel model;

	Connection con = null;
	Statement stmt = null;
	PreparedStatement pstmt = null;
	ResultSet rs = null;	

	public UOMMaster()   //Constructor
	{
		try
		{
			c = getContentPane();
			p = new JPanel();			
			p.setLayout(null);
			
			String data[][] = {};
			String col[] = {"UOM Code","UOM Name"};

			model = new DefaultTableModel(data, col);
			table = new JTable(model)
			{
				public boolean isCellEditable(int rowIndex,int colIndex){
					return false;
			}};

			header = table.getTableHeader();
			p.add(header);
			p.add(table);

			header.setBounds(30,80,350,20);
			table.setBounds(30,80,350,150);

			JScrollBar pane1 = new JScrollBar();
			//table.add(pane1);
			pane1.addAdjustmentListener(this);
			p.add(pane1);
			pane1.setBounds(550,60,20,200);
							

			String data1[][] = {};
			String col1[] = {"UOM Code","UOM Name"};
			model1 = new DefaultTableModel(data1, col1);
			table1 = new JTable(model1)
			{
				public boolean isCellEditable(int rowIndex,int colIndex){
					return false;
			}};

			/*pane1 = new JScrollBar(table1,JScrollBar.VERTICAL_SCROLLBAR_ALWAYS,
           JScrollBar.HORIZONTAL_SCROLLBAR_ALWAYS);
			table1.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);*/
			
			header1 = table1.getTableHeader();
			//header1.setBackground(Color.gray);			
			table1.setBackground(Color.lightGray);

			//pane1 = new JScrollPane(table1);
			//pane1 = new JScrollBar(Scrollbar.VERTICAL,1,3,1,12);
			//table1.add(pane1);
			//pane1.setVerticalScrollBarPolicy(JScrollPane .VERTICAL_SCROLLBAR_ALWAYS);
			//p.add(pane1);

			//table1.add(pane1);
			//pane1.add(table1);
			p.add(table1);
			p.add(header1);
			//pane1.setVisible(true);
			
			//pane1.setViewportView(table1);
			//table1.setViewportView(pane1);
			//pane1.addAdjustmentListener(this);
			//table1.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);

			
			header1.setBounds(30,80,350,20);
			table1.setBounds(30,80,350,150);

			header1.setVisible(false);
			table1.setVisible(false);		
			
   			
			//c.add(p);  
			c.add(p);

			//Create Buttons
			b1 = new JButton("Add");
			b2 = new JButton("Delete");			
			b3 = new JButton("Update");
			b4 = new JButton("Clear All");
			
			//Set Position
			b1.setBounds(35,245,100,20);
			b2.setBounds(125,245,100,20);
			b3.setBounds(215,245,100,20);
			b4.setBounds(305,245,100,20);
						
			//Add Buttons to Panel
			p.add(b1);
			p.add(b2);			
			p.add(b3);
			p.add(b4);
			
			//Create, Set and Add Lables to Panel
			l1 = new JLabel("UOM Code");
			l2 = new JLabel("UOM Name");
						
			p.add(l1);
			p.add(l2);
														
			//Create, Set and Add TextFields to Panel
			t1 = new JTextField(15);
			t2 = new JTextField(15);
						
			p.add(t1);			
			p.add(t2);			
			
			//Set Position
			l1.setBounds(40,25,100,20);
			t1.setBounds(110,25,250,20);

			l2.setBounds(40,50,100,20);
			t2.setBounds(110,50,250,20);

			//Add Panel to Container
			c.add(p);

			b1.addActionListener(this);
			b2.addActionListener(this);
			b3.addActionListener(this);
			b4.addActionListener(this);
								
			t1.addKeyListener(this);
			table.addMouseListener(this);
			table1.addMouseListener(this);

			String driver = "oracle.jdbc.driver.OracleDriver";
			String url = "jdbc:oracle:thin:@ERP:1521:priya";
			String username = "scott";
			String password = "tiger";
			Class.forName(driver);		
			System.out.println("******Driver Loaded*******");		
			
			con = DriverManager.getConnection(url, username, password);		
			System.out.println("******Connection Established*******");
						
			con.setAutoCommit(false);
			
			stmt = con.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_UPDATABLE);
			
		}//try end
		catch(Exception jkl)
		{System.out.println("Exception in Action JJKKLL==> "+jkl);}
	
	}   //Constructor End
}

[Rob Camick]

Why are you trying to write an entire program when you are trying to learn a new concept?. Your question is about a JTable and a scrollbar. People have told you to use a JScrollPane. So only include those two classes in your test programa and keep it simple. Something like this:

import java.awt.*;
import javax.swing.*;

public class TableTest2 extends JFrame
{
	public TableTest2()
	{
		JTable 	table = new JTable(20, 5);
		JScrollPane scrollPane = new JScrollPane( table );
		getContentPane().add( scrollPane );
	}

	public static void main(String[] args)
	{
		TableTest2 frame = new TableTest2();
		frame.setDefaultCloseOperation( EXIT_ON_CLOSE );
		frame.setSize(300, 200);
		frame.setLocationRelativeTo( null );
		frame.setVisible(true);
	}
}

[janavi patel]

Are yaar*.... all things are related and impacting each other...thats why....

*Are yaar=="Hey dude" or "Man"

[MG]
Janavi,
We got people from all over the world here.
Please use real words
[/MG]

[Rohit Aggarawal]

Code is slightly modified for the method MyFrame8 and that works now. Please use this piece of code...

   
   public MyFrame8(String Username, String Password)   //Constructor
    {
        c = getContentPane();
        p = new JPanel();
        p1 = new JPanel();
        p1.setLayout(new BorderLayout());

        String[][] data = {};
        String[] col = {"Username", "Password"};
        table = new JTable(data,col);
        pane = new JScrollPane(table);
        pane.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_ALWAYS);
        pane.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
        this.add(pane);
    }   //Constructor End

[Maneesh Godbole]

Rohit,
Please use code tags
You can add them to your existing post by clicking on the button

[Rohit Aggarawal]

Maneesh,

Done as per your suggestion.

-Rohit

[Maneesh Godbole]

Thank you

[janavi patel]

Hi Rohit..
I tried this code:

public MyFrame8(String Username, String Password)   //Constructor   
    {   
        c = getContentPane();   
        p = new JPanel();   
        p1 = new JPanel();   
        p1.setLayout(new BorderLayout());   
  
        String[][] data = {};   
        String[] col = {"Username", "Password"};   
        table = new JTable(data,col);   
        pane = new JScrollPane(table);   
        pane.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_ALWAYS);   
        pane.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);   
        this.add(pane);   
    }   //Constructor End  

but still its not showing a table and positions of all other components is different because of p = new JPanel(); ....

and if I used p = new JPanel(null); then components positions are right as they defined but still not showing a table.......

[Maneesh Godbole]

Did you try out Rob Camick's code?

[janavi patel]

Yes, I tried that.....
It works when there is only container and not panel and it hides all other components....
And when panel is used all positions are proper bue there is no scrollbar....

[Michael Dunn]

> Yes, I tried that.....

and, as usual, it worked.


> It works when there is only container and not panel and it hides all other components....
> And when panel is used all positions are proper bue there is no scrollbar....

then, why don't you post your (altered Rob Camick's) code to prove the above?

[Rohit Aggarawal]

Dear janavi patel

You can use the modified code that was posted by me earlier and It will run like anything. I took not more than 1 minute to modiffy and run your code.
I am still wondeing why that does not work on your machine.

-Rohit

[Maneesh Godbole]

"Rohit agl",
Please check your private messages for an important administrative matter.

[janavi patel]

Hi Rohit
I tried your code snippet in my program as follows:

public MyFrame8(String Username,String Password)   //Constructor
	{
		try
		{
			String data[][] = {};
			String col[] = {"Username","Password"};
			model = new DefaultTableModel(data,col);			
			table = new JTable(model)
			{
				public boolean isCellEditable(int rowIndex,int colIndex){
				return false;
			}};
	
			pane = new JScrollPane(table);   
			pane.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_ALWAYS);   
			pane.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS);
			
			c = getContentPane();
			getContentPane().add(pane);
			p = new JPanel();			
			p.setLayout(null);
			//p.setLayout(new BorderLayout());
			
			//pane.setBounds(20,125,460,140);
			//header.setBounds(20,125,450,25);
			//table.setBounds(20,150,450,130);
			
			//Create Buttons
			b1 = new JButton("Add");
			b2 = new JButton("Delete");			
			b3 = new JButton("Update");
			b4 = new JButton("Clear All");
			
			//Set Position
			b1.setBounds(38,300,90,25);
			b2.setBounds(148,300,90,25);
			b3.setBounds(258,300,90,25);
			b4.setBounds(368,300,90,25);
						
			//Add Buttons to Panel
			p.add(b1);
			p.add(b2);			
			p.add(b3);
			p.add(b4);
			
			//Create, Set and Add Lables to Panel
			l1 = new JLabel("Username");
			l2 = new JLabel("Password");
						
			p.add(l1);
			p.add(l2);
														
			//Create, Set and Add TextFields to Panel
			t1 = new JTextField(20);
			t2 = new JTextField(20);
						
			p.add(t1);			
			p.add(t2);			
			
			//Set Position
			l1.setBounds(125,30,80,25);
			t1.setBounds(205,30,160,25);

			l2.setBounds(125,70,80,25);
			t2.setBounds(205,70,160,25);

			//Add Panel to Container
			c.add(p);			
			
		}//try end
		catch(Exception jkl)
		{System.out.println("Exception in Action JJKKLL==> "+jkl);}
	
	}   //Constructor End

1. Now it adds scrollpane to the table but not showing other components.
2. Also shows srollable table for full frame. For this I tried pane.setBounds() but no effect.
3. Doesn't matters panel's layout even whether panel is used or not.

[Maneesh Godbole]

janavi patel wrote:
1. Now it adds scrollpane to the table but not showing other components.
2. Also shows srollable table for full frame. For this I tried pane.setBounds() but no effect.
3. Doesn't matters panel's layout even whether panel is used or not.

I am not surprised. You have chosen to ignore the hints/ready made code provided to you.
Recommended reading
http://java.sun.com/docs/books/tutorial/uiswing/layout/visual.html

[janavi patel]

manish
this is last time I am telling to you I tried all hints and every other thing that I can do...
if you cant help or dont want to help then its more better for both of us that you just stay away from this matter.......

[Maneesh Godbole]

janavi patel wrote:manish
this is last time I am telling to you I tried all hints and every other thing that I can do...
if you cant help or dont want to help then its more better for both of us that you just stay away from this matter.......

To start with I am a volunteer here and I do not get paid for this work. Even if I was getting paid, I still do not have any reason to put up with this kind of language.
I do not see you trying out my suggestions which I gave here I wonder if you found time to go through the links I had provided.
Michael Dunn (another volunteer) had requested you to

then, why don't you post your (altered Rob Camick's) code to prove the above?

. You did not respond to it. BTW, Rob Camick is another volunteer.

If you want to learn, it might be a good idea to try out suggestions. You can always ask why. If you want ready made solutions (and the learning is not really important), then you are in the wrong place. All volunteers here are entitled to some respect.

Have a nice day and best of luck with your code.

[janavi patel]

sorry for that.....
actually I never behave like this with anyone but everytime manish replied against me.....
everytime i said i tried and you just opposed me and nothing else thats why...........
and in my code i did too many changes so its not possible for me to send the code......
and I want to learn thats why I am doing all these things.......

sorry once again......
and I m saying sorry not because you are a volunteer but because of this is not in my nature.......

[Rob Camick]

I did too many changes so its not possible for me to send the code......

You learn by walking, not running. Forget about your real program, you are just trying to learn basic concepts, so you start with a basic program.

Why do you think I gave you the 10 line complete example program?

That program shows how to display a table with scrollbars. The next step is to add a couple of text fiields. If it works great, if not, then you have a 10-15 line program to post in the forum that we can look at. Once that works you move on to the next step.

Finally, when you understand how LayoutMangers work and how to you add components to a panel you go back to your real program to figure out what you did wrong. We are not here to debug you program for you. Frankly, if you can't figure out how to add components to a panel then you shouldn't be doing Swing programming. This should be the first think you learn because it only gets more difficult.

[Michael Dunn]

> actually I never behave like this with anyone but everytime manish replied against me.....

you've missed the point, totally. There's nothing 'personal' in it.

all everyone is doing is trying to get you to think about what you're doing, how you're going about it,
giving you some hints/nudges in the right direction.
This makes it much easier for you the next time you have a problem.

[Dipanjan Kailthya]

Another problem is that you're creating and displaying your GUI objects in the main thread. All that should really be done in the event dispatching thread. If you're using java6, try http://java.sun.com/javase/6/docs/api/javax/swing/SwingUtilities.html#invokeLater(java.lang.Runnable)