Swing/AWT/SWT :: How To Detect That User Has Typed A Character In JTable Column
May 3, 2015
I have a JTable with 5 columns, named: "ID", "Name", "UnitPrice", "Qty", and "Total". Only the columns UnitPrice and Qty are editable by the user. When, for example, for a row in the JTable, the user types 5000 in the UnitPrice column, and types 15 in the Qty column, I would want that when he types the first character in the Qty column (i.e. the character 1) in the Qty column, the Total column displays 5000*1, in other terms 5000.
And when the user types the second character in the Qty column, i.e the character 5, after having typed 1, the Total column should display 5000*15, in other terms 75000. So, to say it concisely, I would want that the Total column refreshes accordingly each time the user types a character in the Qty column. I have tried to use the MouseClicked event of the JTable, but noticed that that does not solve my problem. is there an event I should use to refresh my Total column? Or should I proceed in another fashion?
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?
I have a JTable with the model " Names " , " Quantity " and " Unit " .
I'm coding a program where you get the ingredients names.
So i need to get the whole row of one column and String it all up together,because i need to store it in mySql and i have already set it all as String.
how i can do this ?
My code are as follows :
JTable Code:
DefaultTableModel model = (DefaultTableModel)table.getModel(); if(!txtQty.getText().trim().equals("")){ model.addRow(new Object[]{ingCB.getSelectedItem().toString(),txtQty.getText(),unitCB.getSelectedItem().toString()}); }else{ JOptionPane.showMessageDialog(null,"*Quantity field left blank"); }
Getting the values and for storing :
for(int i = 1; i<= i ; i++){ ingredients = table.getName(); }
This is for loop is wrong and it does not work because i have a constructor to take in Ingredients but because it is inside the loop, it cannot take it in.
I have a Jtable which shows contents on each row. but the row contents which are bigger than the width of the column gets shown as "BlahBlah.." (basically getting showed up as .. in the end)
User has to manually increase the width of the column to see those extra contents.For e.g if the row contents are ABCDEFGHI and the widht of the column for that row is sufficient enough to show only ABCDEF of that, then it will show up as something like "ABCD.."Now my requirement is to show the complete contents over to next column on the same row.
Note: I could simply add the code to show the widht of the column to adjust according to largest row content for that column . But unfortunately this is not what is required.
When i run my program i see a JTable with data in it. The first 3 columns are filled with data, the next one is empty. Other columns that come afther the empty one are also filled.
So my 4th column is empty. But it only apears empty, cause when i move the 4th column to the left. The same column that was at 4th place is now at 3th place and filled up with data.
So the 4th column apears empty but it contains data when i move it to the left or the right.
Why does it show an empty column at the 4th place?
Some printscreens to get it clear:
In attachment:
attachment1 = 4th Column is empty attachement2 = 4th column is moved to 3th place and is filled with data.
I am trying to sort a JTable on an all numeric (integer) column. From what I read, if the sorter knows the type is integer it should sort correctly. This is my code:
public class ActorTableModel extends DefaultTableModel { private static final long serialVersionUID = 1005352603826663105L; public ActorTableModel (Object data[][],Object columnNames[]) { super(data,columnNames); } public Class<?> getColumnClass (int column) { if (column==0) { return(Integer.class); } return(String.class); } }
The result is when I sort on that column (0), it sorts alphabetically not numerically.
How would you set a column in a JTable to make it unable to gain focus i.e. select the next column on the same row or ignore the command completely when selecting a column that should not be able to be gained focus on?
I'm working on a spreadsheet-like table and I was able to set it so that it would highlight the first cell in the relevant row(titled 1,2,3.. etc) when a cell is clicked. (Just like in MS Excel - preview attached) Now I want to do the same to the column header(i.e. A,B,C,D....etc) . How can I do it?
private void formWindowOpened(java.awt.event.WindowEvent evt) { setLocationRelativeTo(null); int rowNum = sheet.getRowCount(); for(int i=0; i<rowNum; i++){ sheet.setValueAt(i+1, i, 0);
I'm having an issue with my program that needs 2 lines of input when I only want one. First I call Scan.nextLine(); to fetch a word. Then I want Scan.findInLine(word).charAt(number); to scan the string word for a letter instead of having to put another line in the console. How do I make Scan.findInLine(word).charAt(number); scan a single String instead of scanning input typed by the user?
i need a password program that does the following:
- only shows the character count - toggles between seeing the actual letters and character count in the text field with a button
i don't know how to update the character count as the user is counting.i read the oracle tutorial, and i have a vague idea that i'm supposed to use Document Listener but i'm quite clueless here.for the second part i'm thinking about using white space for the masking character and unmasking the field.
import java.util.Scanner; public class Project_5 { public static void main (String[] args) { Scanner input= new Scanner (System.in);
[code]....
So I'm attempting to have this program take the users input of integers, pressing enter in between each one. If they enter a negative number it lets them know that its invalid. At the end of the program it takes all of the valid integers entered and must add them and average them. I've put the final println in there as a placeholder. If the user types in "6" then presses enter and types in "3" , the output is:
There were 3 valid numbers entered. The sum of the valid numbers was --- and the average was ---. There were 0 invalid numbers entered.
It then continues on allowing the user to enter more values. Here is the example output for correct code"
Enter a positive value (EOF to quit): 4 Enter a positive value (EOF to quit): 7 Enter a positive value (EOF to quit): 8 Enter a positive value (EOF to quit): 2 Enter a positive value (EOF to quit): -1 The number "-1" is invalid.
Enter a positive value (EOF to quit): 8 Enter a positive value (EOF to quit): 0 Enter a positive value (EOF to quit): -4 The number "-4" is invalid.
Enter a positive value (EOF to quit): CTRL-D
There were 6 valid numbers entered. The sum of the valid numbers was 29 and the average was 4.83. There were 2 invalid numbers.
I am making a gui in which i read values from text file to JTable. But i want to define the column header as A,B,C,D,E,F,G,H,I. Now when i read, the values from text file are getting displayed in Jtable headers. How can i achieve the column header as A,B,C,D,E,F,G,H,I.
import java.awt.*; import java.awt.event.*; import java.io.*; import java.util.*; import javax.swing.*; import javax.swing.table.*; public class Bb extends JFrame {
I have a jtable. the fields are like Product_code,Product_name,Qty,Rate in my java program.. now i want to do is when i press a first letter in my jtable under Product_name like "P" it will display the reminding Product_name which will have the starting letter of "P" like pen, pencil, peper like this i want to populate in my jtable.
I have a database table containing two columns A and B. They both contain integers. I'd like to know if it's possible, when displaying them in a JTable, to be combined in one column X. I still need, however, to be able to distinguish them from each other when selecting a row from the JTable. E.g. to store each of the values in a a separate variable. Maybe I can combine them when reading from the ResultSet and use some sort of delimiter ? But how?
I created filters for every column in my Jtable however, some of these columns have more than one word inside of them and my filters will only filter them based on the first word. For example if I had a first and last name in one column, it will filter the table if I enter the first name in my filter text field but it will not filter that same column if I only input the last name. What is a good regex expression to filter any word in any order?
import java.awt.*; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.*; import javax.swing.border.Border; import javax.imageio.ImageIO; public class Main extends JApplet implements Runnable, ActionListener {
[Code] .....
I am making a game and there are two problems that I have and can't seem to solve. I never made on applet before, and I'm not good with the swing components, but I am decent programming in Java.
Problem #1: the start button is in the JPanel, I don't want that, I want it to be above the JPanel. Problem #2: I want to put images in to a JTable for organization and character selection purposes, but I keep on getting a string. Do I have to use an ImageIcon to get it to work, or does it matter?
In case you were wonder what kind of game I'm making, I'm making one of those jump games where you jump on platforms and try to go as high as you can without missing a platform. There is going to be character selection for the jumper, and the jumpers are going to be food, like a potato, a banana, a strawberry, etc.
I am instructed to create a program that reads input from the user and turns it into a desired matrix size (row and column between 0-10). I have written the code for the input window, however I am having trouble with the Event Handler for the JButton in said window. The JButton should read the info (row and column size) and create three new windows. Two of the windows will hold info entered into the matrix by the user, and the third window will have another button that adds the two matrices together and shows the output. I have always had trouble comprehending how to use and implement JButtons. Here's my code thus far.
Here i want to print the String from Starting character which is given by user..Here i given below the image like my concept..here we put .(dot and enter R)eclipse will print the method name which is starting from R..
/* * To change this template, choose Tools | Templates * and open the template in the editor. */
package firstgui; import javax.swing.*; import java.awt.event.*; public class TicTacToe {
[Code] ......
Program is 10x10 board, I need to check if the user's input is a duplicate of any number in that same column, but I can't figure it out. When I tried it, it always check the same box. For example, if I entered 4 in [1][1] (going by 10x10 grid), it automatically checks right after I entered that [1][1] is the same as my input and erases it. My professor wants me to check it with the "CheckWinner" method.
I tried the following when someone told me to pass the reference of the JButton being clicked to ignore it.
Hiding the column but not removing , because i need to bring this column id to the next screen, only i do not want to show the column but internally it has to take the value to navigate the screen, but if i use below code, i am getting null pointer exception,
