JTable Does Not Display
Jul 13, 2014
I have created a JTable which does not display. When I run the program I can see that a line appears around the edge of the panel indicating the JScrollPane is added to MyJPanel, however, the table is missing. This is the table
public class MyJTable extends JTable {
private Object[][] data;
private Object[] columns;
private MyTableModel model = new MyTableModel(data, columns);
public MyJTable(Object[] columns, ArrayList<Data> data) {
this.columns = columns;
for(Data d:data){
[code] ....
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Jan 20, 2014
I want to display a Hash Map to a GUI..my hashmap contains data as follows:
BC111S04=[22, 17302, 50, 17485], BC111S03=[22, 17302, 50, 17485], BC111S02=[22, 17302, 50, 17485], BC111S01=[22, 17302, 50, 17485], BC111SV1=[22, 17302, 50, 17485], BC111SV2=[22, 17302, 50, 17485], BC111M01=[22, 17302, 50, 17485]
in above BCXXXXXX is the Url of DB and the ones in Square bracket are results of some query.I want to display them in format as in below picture:my code for GUI is as follows
package gui;
/**
* Class that takes a query as input from GUI and fetches the required output from Database and display it on GUI.
*/
import java.sql.*;
import java.util.*;
import java.awt.event.*;
import javax.swing.*;
import com.POS;
[code]....
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Jun 5, 2014
I have an int array that has information read from a file. Now i want to display this int on a jtable but ofcourse i cant display primitive data types.. and also you cannot cast an int[] to an Object[], so I am stuck...
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Feb 26, 2015
I was trying to run an sql query to display onto my jtable. However, i got this as a result:
oracle.sql.CLOB@11876a2
When I run the same SQL query on Toad i get the field hugeclob and one is then able to see whats inside the field. I want to basically either have a hugeclob on my jtable or perhaps to display on a textarea the data
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Jan 5, 2015
I stored an image into MySQL database using swings and hibernate but I am struggling to retrieve that image from MySQL database and display same image in the jTable cell and same as on jLabel whatever I retrieve from the database using swings and hibernate .
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May 26, 2014
I need to compare two jtable and set the value from one jtabel to the other jtable.
jtable one consist of:
Unit ID Unit Name Access
ABC, Inc ABC Incorporate (checkbox) value = uncheck
CDE, Inc CDE Incorporate (Checkbox) value = uncheck
jtable two consist of:
Unit ID Access
ABC, Inc ABC Incorporate (checkbox) value = checked
CDE, Inc CDE Incorporate (Checkbox) value = checked
if comparing jtable one an jtable two has the same Unit ID then colum Access from jtable two value is set to jtable one become check based on jtable two.I did the code but did not work:
for (i = 0, jTable1.getrowcount(), i++) {
for (j = 0, jTable1.getrowcount(), j++) {
if (jTable1.getvalueAt(i,0) == jTable2.getvalueat(j,0)) {
jTable1.setvalueat(true,i,2)
}
}
}
above code i try did not make any changes.
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Mar 18, 2014
Write a class named FileDisplay with the following methods:
1.) constructor: the class's constructor should take the name of a fil as an arugment.
2.) displayHead: This method should display only the first five lines of the file's contents
Here is the following code I have made so far
import java.io.*;
public class FileDisplay
{
private String filename;
public FileDisplay(String Filename) throws IOException
[Code] ....
First, in my constructor I have taken in an argument and used that argument to open up an output file. Meanwhile, I'm trying to work n the displayhead method to print out information and to read data to. I haven't opened up my input file yet, but I'm not understand how can I read a print data to an output file. in
public void displayHead()
{FileWriter file=new FileWriter(Filename)}
do I make create another instance of the filewriter class to output data?
In simple words, suppose to I want to display some messages on my output file in the displayhead function. Since I already have opened up the file in the constructor, how do I combine that in this method...
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Nov 19, 2014
I am developing a product where the client needs to display the content of XML in a JSP page. This XML will be extracted from database and will be temporarily sotred in a String object and will then be flushed to JSP page for display. This was working fine unitl now. But now the customer wants display each tag with one color. attribute in another color and data in another color.
For ex: <?xml version="1.0" encoding="UTF-8"?>
this should be displayed in one color. Then
<ichicsrmessageheader>Data</ichicsrmessageheader>
In the above one the tag should be displayed in one color and "Data" should be displayed in another color
<organisation operationtype="1">Data</organisation>
In the above sample tag should be in one color and attribute should be in one color ex: red and value of the attribute should be in another color ex: blue and "Data" should be in one color ex: green.
Here is the sample screen shot of how xml should is currently being displayed.
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Jun 5, 2014
i must get minimum value of 4th row in jTable and place it in textfield, but i can't do this
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Jan 9, 2014
how can i sort a Jtable, If i have in a certain column Strings and Integers, but I don't want to sort like string.example:
ID |
----------
1
11
2
213
22
MOSTR
MOSTIR
i dont want this to happen when i sort this column, I'm using table.setAutoCreateRowSorter(true);
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Aug 12, 2014
How to get value from jTable? I use mouse click event for my jtable and then, i want to set value to datechooser. Usually my behaviour for get value from jTable to Textfield, i'm using this method.
txtNamaKlien.setText(String.valueOf(jTable1.getValueAt(jTable1.getSelectedRow(), 1)));
And then value from jTable success fill to textfield.
My problem value from jTable not success fill to jdatechooser, i'm using this method
Date tanggal = (Date) jTable1.getValueAt(jTable1.getSelectedRow(), 2);
jDateChooser1.setDate(tanggal);
And I get an error
java.lang.ClassCastException: java.lang.String cannot be cast to java.util.Date
I'm using database mySQL
When inserting data, i use this method
java.text.SimpleDateFormat fmt = new java.text.SimpleDateFormat("yyyy-MM-dd");
String formattedDate1 = fmt.format(jDateChooser1.getDate());
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Jan 17, 2015
I'm trying to implement a spreadsheet-like table using JTable and this is the basic structure.
String[] colnames={"A","B","C","D","E"};
String[][]data=new String[28][5];
sheet = new JTable(data,colnames);
//sheet.setBounds(10, 36, 527, 214);
JPanel tablepane=new JPanel();
tablepane.add(new JScrollPane(sheet));
tablepane.setSize(800, 400);
In a spreadsheet, alphabetical letters are column names and numbers represent rows. I have named the columns and I need to name the rows in the same way. Or if I am to set the first column in every row as row headers, how can I make then non-editable by the user? In addition to that, how can I make the table appear bigger? There's a lot of space but the table appears to be small.
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Dec 6, 2014
I have created Jtable which stores images and Strings, I can SAVE the content to external file, however whenever I will try to load it back (below code) to JTable, it throws me an error. One field in the JTable uses renderer for images, and the code throws everything back as a String ) how can I transform one 'word' (e.g. /usr/etc/test.jpg) in a text file to ImageIcon which will be handeled by the renderer? Should I read the file 'word' by 'word' store it as array and load it into column?
private void check() {
String path = "Tab.csv";
File source = new File(path);
if (source.exists()) {
DefaultTableModel mdl = (DefaultTableModel) Tab.getModel();
String line;
BufferedReader reader;
[code]....
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Nov 9, 2008
My JTable has a row, row number 0, which I always want to be at the top.I tried the following two approaches, both without success:
1- Use a custom table cell renderer for the header, and create a header of two rows. the second row is my JTextField.
Problem: I cannot get the JTextField to function properly. (I've seen examples with a checkbox in the header, but that one just reacts to a click somewhere on the header, my textfield must be editable).
2- Use the first row of the table. This works quite nice. However, I must prevent row 0 to be re-ordered when sorting the table.
I was thinking to add a prefix (either something like "___" or "zzz" depending on current sorting mode), but I do not know which methods to adjust for this exaclty.
Another approach would be to have N textfields above the JTable in some layout (or two JTable's on top of each other).
However, Then I would need to react to the re-ordering and re-sizing of all columns as well, which does not seem easy to me.
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Apr 18, 2014
Can I use Jlist instead of Jtable for showing database table data (select * from employee) in my code?
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Mar 26, 2015
I have encountered a very tricky spot in a project that i am working on. I must have a JTable to programmatically select the very last row in an AbstractTableModel. I have tried every thing but nothing works so far.
The problem is is that the JTable only scrolls down to the second last table row in the model? What am i missing?
//Show the very last row in a tablemodel object using the method updateTableRows
//after an "insert action event" occurred
public void updateViewMode(String name,
java.util.List<NetworkSwitch> list,
boolean flag) {
CableTableModel model = cableTable.getCableModel();
[code]....
What happens is that the only row that gets selected is the second last row of the total rows iny AbstractTableModel object, "CableTableModel"
What am i missing?
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Nov 17, 2014
I am preparing a small solution. Below is how the functionality works.
1. Login Screen
2. Successful Login will take to a MDI Form
3. Click the menu, a JInternalFrame will open in the JDestopPane.
4. JInternalFrame has a JTable.
5. JInternalFrame has a JButton available for adding new data.
6. When JButton is clicked, a new JInternalFrame is popped up with some JTextField and JButton to save the data.
7. After saving the data (after insert query), a JDialog is opened to upload Logo (update query for BLOB), There are two buttons in the JDialog, one is for uploading the image, another one is uploading it later.
8. The logo is displayed in the JDialog and if the JButton, for upload is pressed, update the database and reload the JTable in the JInternalFrame is called.
My challenge is in point 8. The function is called properly, but the table is not getting refreshed.
JButton in JDialog for uploading the Logo
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
JOptionPane.showMessageDialog(this, "Image Uploaded Successfully");
companyConfig cc = new companyConfig();
//cc.reloadTable();
cc.updateTable();
this.dispose();
[code]....
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Nov 18, 2014
I have a panel which has set to cardLayout and at the bottom, I have the buttons, based on the button clicked I will change my cards further and back. My second card has Jtable which allows the user to edit a particular cell. Now my problem is for the first time, when the data is inserted into the table, the particular column's cell is getting editable and allowing user to edit the cell and take the value what user gives. But when I come from 3rd card to the 2nd card, I have to show the previous created table or again from my 1st card if I move to the second card (in the same opened application), the cell's in the jtable is getting editable but not allowing the user to enter the text to the cell?? why is this problem coming?? I tried repainting that table when I move from 3rd card to 2nd card, and when coming from 1st to 2nd card the jtable rows are removed and new rows are inserted. But still the same problem arrives?? why is it working correctly in the first time and not able to in the second time??
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Feb 9, 2015
I've been creating a jTable where I can add / edit /delete new entries. Now i have 2 Questions :
1) My column 0 is filled with the row-number. I created a variable and with each "add" it adds +1 to the variable. That works, but as soon as i delete 1 row there is a gap ( 1..2..4..5..).
My question: Is there another way then mine to handle this?
2) The table is/should be working as some kind of database. The user is able to add Information (height, width,...). Now I want to sum the entries of 1 column (length,...). But as they´re objects I didn´t find a way.
My question: How can I sum the entries of 1 column of a table?
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Aug 19, 2014
How do i parse a String of text in a JTable Cell to work as a button?For example lets say a row of IDs such as 1,2,3,4,5,6 id like the whole column to parse as JButtons that are titled 1,2,3,4,5,6..Id like to then use these buttons to call a function with the title as a parameter.Its just a simple row of entries where the button will open up an edit screen to edit the corresponding clicked entry.So how do i parse them as buttons for a start?
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Jan 11, 2015
I am trying to output the content of a JTable to printer.Heres my code:
Java Code: private void cmdPrintActionPerformed(java.awt.event.ActionEvent evt) {
try
{
PrintRequestAttributeSet set = new HashPrintRequestAttributeSet();
set.add(OrientationRequested.LANDSCAPE);
vendTransOpen.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
vendTransOpen.setModel(new Classes.VendTransOpenGrid());
vendTransOpen.setSize(vendTransOpen.getColumnModel().getTotalColumnWidth(), vendTransOpen.getRowHeight() *
[code]....
I have a problem with the table and column size. I would like it to be the same size as I have on my screen.
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Apr 24, 2014
I am trying to create a JTable and I want to implement an undo option in it. Is it possible that I store the table model at some part of the operation and later when i press an undo button or something, I can set the saved table model so that it will perform like an undo.
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Apr 9, 2014
I want to build a class that takes a JTable and previews on screen how it will be printed on the default printer. This is what we use to call as "Print Preview", just like MS Word, Excel, etc.
As we already know Java does not support this functionality out-of-the-box.
Based on some examples I've found googling I built two classes. The first one TestPreview.java justs shows the JTable and the second one PrintPreview.java previews how the JTable will be printed on the printer.
I have two buttons to go through the pages, "PREV" and "NEXT" and "Print' button to print the JTable. My problem is that when my JTable has too many rows and spans in more than one page PrintPreview does not work. It shows the same page again and again. Also, it does not show the entire JTable data, but only some of them and I can't figure out why.
Below is my two classes
TestPreview.java
package printpreviewdemo;
import javax.swing.*;
import java.awt.BorderLayout;
[Code].....
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Jul 29, 2014
I have a jTable with two columns and in the second Column I would like to have 2 different cell-renderer. One is String and the other one is boolean. The data is always from type Object[][]. I have written an own renderer:
Java Code:
@Override
public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) {
if(column == 2 && row > 2){
return super.getTableCellRendererComponent(table, (boolean)value, isSelected, hasFocus, row, column);
}
return super.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, column); //To change body of generated methods, choose Tools | Templates.
} mh_sh_highlight_all('java');
I set the default renderer in my form:
Java Code: jTable.setDefaultRenderer(Object.class, myRenderer); mh_sh_highlight_all('java');
So the problem is, that my JTable will always renderer to String. I thought when i write "(boolean)" before "value" (in my IF-Statement), he returns the boolean cell renderer. But it isn't doing that.
How can I return a boolean-renderer in my column 2 with all rows higher than 2 ?
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Jan 6, 2015
how I can highlight one column with color? When i add color to a column the entire table is colored.
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May 26, 2014
The JTable that I'm using in my program fetches its value from the database. Now one of the fields contain the link item. I basically want it to be clickable so that once the user clicks on this link then he is directed to the desired webpage. I've tried to implement this in my code but somehow nothing seems to work.
Java Code:
public class JTableButtonMouseListener extends MouseAdapter
{
private final JTable table;
public JTableButtonMouseListener(JTable table) {
this.table = table;
[Code] .....
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