How to make Jtable cell empty onClick?
Hi All,
I have one requirement where I need to make the Jtable cell value empty on click or tab event. So, User does not have to do back space and delete whole string to edit that cell.
Any idea?
Thanks in advance.
Hi camickr,
Thanks for that reply. It did not work for me but Here is the thing.
My requirement was : Client does not want to do back space in order do edit cell value when that cell clicked.
I tried find the solution that, i can make that cell area as selected when it is clicked. my problem is solved. So, I tried to use Table select all editor.
But here is what i found ......
If I want that cell area selected, I need to do one more click(3 clicks at the same time) to select the value of that cell & I can put my new value without doing back space(stupid client requirement)
Thanks for your help
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How to make a cell in a JTable to be uneditable and handle events
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Hello Klaas2001
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Suppose you have set the value of cell using setValueAt()
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Regarding handling events implement javax.swing.event.TableModelListener
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I am using cl_gui_alv_grid .
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Loop at your internal table.
Eg: i have total 5 fields in my internal table itab_zqmeinz. in that 3 fields are editable as below.
declare DATA: lt_celltab TYPE lvc_t_styl.
internal table with celltab as one of the column
DATA: BEGIN OF itab_zqmeinz OCCURS 0. "TYPE STANDARD TABLE OF zqmseqkopf
INCLUDE STRUCTURE zqmseqeinz.
DATA: celltab TYPE lvc_t_styl.
DATA: END OF itab_zqmeinz.
LOOP AT itab_zqmeinz INTO wa_zqmeinz.
l_index = sy-tabix.
REFRESH lt_celltab.
CLEAR wa_zqmeinz-celltab.
PERFORM fill_celltab1 USING 'RW'
CHANGING lt_celltab.
INSERT LINES OF lt_celltab INTO TABLE wa_zqmeinz-celltab.
MODIFY itab_zqmeinz FROM wa_zqmeinz INDEX l_index.
ENDLOOP.
FORM fill_celltab1 USING value(p_mode)
CHANGING pt_celltab TYPE lvc_t_styl.
Refresh pt_celltab.
clear ls_celltab.
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l_mode = cl_gui_alv_grid=>mc_style_enabled. "to enable the required fields
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l_mode = cl_gui_alv_grid=>mc_style_disabled.
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ls_celltab-style = l_mode.
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ls_celltab-fieldname = 'BEZEICHNUNG'. "field2
ls_celltab-style = l_mode.
INSERT ls_celltab INTO TABLE pt_celltab.
ls_celltab-fieldname = 'SORTIERUNG'. "field3
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Endform.
It works. I have done it in my program.
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Is there any way to make a specific cell read only with in a specific data form?
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Message was edited by: Danijela ZivanovicHI,
To make a column editable, it will be sufficient to set the field <b>EDIT</b> in the field catalog. The ALV Grid perceives if there are some editable fields and adds buttons for editing purposes. If you do not need these new buttons
<u><i>if you want it in the Classes</i></u>
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<b>Example:</b>
FORM adjust_editables USING pt_list LIKE gt_list[] .
DATA ls_listrow LIKE LINE OF pt_list .
DATA ls_stylerow TYPE lvc_s_styl .
DATA lt_styletab TYPE lvc_t_styl .
LOOP AT pt_list INTO ls_listrow .
IF ls_listrow-carrid = 'XY' .
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ls_stylerow-style = cl_gui_alv_grid=>mc_style_disabled . APPEND ls_stylerow TO lt_styletab .
ENDIF .
IF ls_listrow-connid = '02' .
ls_stylerow-fieldname = 'PLANETYPE' .
ls_stylerow-style = cl_gui_alv_grid=>mc_style_enabled . APPEND ls_stylerow TO lt_styletab .
ENDIF .
INSERT LINES OF lt_styletab INTO ls_listrow-cellstyles . MODIFY pt_list FROM ls_listrow .
ENDLOOP .
ENDFORM
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In the main program :
find.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent ae) {
datahome = cC.data;
TableColumnModel colModel = cC.jtable.getColumnModel();
TableColumn column = colModel.getColumn(0);
column.setCellRenderer(new RedCellRenderer(new int[] {1,2}));
in the cellrenderer:
package packageSolo;
import javax.swing.table.DefaultTableCellRenderer;
import javax.swing.*;
import java.awt.*;
public class SetCellColour extends DefaultTableCellRenderer {
private int arrVerifyColumns[] = null;
public SetCellColour(int iTestColumns[]) {
arrVerifyColumns = iTestColumns;
public Component getTableCellRendererComponent(JTable table, Object value,
boolean isSelected, boolean hasFocus, int row, int column) {
this.setBackground(Color.RED); // All columns verified were empty - set
// our background RED
return this;
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my code for the actual JFrame:
package packageSolo;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.*;
public class ConflictCheckerGUIIntialization extends JFrame {
* debugger
* @param x
* takes in an int and prints a debug line when enabled to the
* console
private void debug(int x) {
// System.out.print("Flag: "+ x);
private static int flag1 = 0;
private static int flag2 = 0;
private static int flag3 = 0;
private static int flag4 = 0;
private static int flag5 = 0;
private static int flag6 = 0;
private static int flag7 = 0;
private static int flag8 = 0;
private static int flag9 = 0;
private Object[][] datahome;
private JButton cConflict = new JButton("Check Conflict");
private JButton find = new JButton("Find");
private JButton quit = new JButton("Exit");
// private JButton northavg = new JButton("North's Average");
// private JButton eastavg = new JButton("East's Average");
// private JButton largest = new JButton("Largest Percepitation");
// private JButton totalPercepitation = new JButton("Total Percepitation");
private ConflictCheckerGUI cC = new ConflictCheckerGUI();
private JFrame jf = new JFrame();
private JFrame jf1 = new JFrame();
// Get the size of the default screen
private static Dimension dim = Toolkit.getDefaultToolkit().getScreenSize();
private int screensizex = (int) (dim.width * 0.8);
private int screensizey = (int) (dim.height * 0.75);
private static int gcsizex = (int) (dim.width * 0.625);
private static int gcsizey = (int) (dim.height * 0.1953125);
private static GUIConsole gc = new GUIConsole("Output", gcsizex, gcsizey);
public ConflictCheckerGUIIntialization() {
boolean RunOnce = false;
while (RunOnce == false) {
if (cC.finished == true) {
System.out.println("he");
Container c1 = jf.getContentPane();
c1.setLayout(new FlowLayout());
Container c = this.getContentPane();
Container c2 = jf1.getContentPane();
JPanel jp = new JPanel();
jp.add(cC);
cConflict.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent ae) {
datahome = cC.data;
// System.out.print(datahome
// [0][0].toString().compareTo(datahome
// [1][0].toString()));
// System.out.print(datahome
// [0][0].toString().equals(datahome
// [1][0].toString()));
for (int conflictCounter2 = 1; conflictCounter2 < 3; conflictCounter2++) {
int conflictCounter4 = 0;
for (int conflictCounter1 = 0; conflictCounter1 <= cC.Classroomint; conflictCounter1++) {
conflictCounter4++;
for (int conflictCounter3 = 1; conflictCounter3 <= (cC.Classroomint - conflictCounter4); conflictCounter3++) {
if (datahome[conflictCounter2][conflictCounter1]
.toString()
.equals(
datahome[conflictCounter2][conflictCounter1
+ conflictCounter3]
.toString())) {
System.out.println("error at "
+ conflictCounter2 + " "
+ conflictCounter1);
* for (int counter1 = 0; counter1 < pg.monthint;
* counter1++) { for (int counter2 = 0; counter2 < 5;
* counter2++) {
* System.out.print(datahome[counter1][counter2] +
* "\t"); } System.out.println(); }
quit.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent ae) {
try {
System.exit(0);
} catch (SecurityException ea) {
System.out.println("Cannot exit");
find.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent ae) {
datahome = cC.data;
Object value = null;
cC.jtable.getCellRenderer(0, 0)
.getTableCellRendererComponent(cC.jtable,
value, false, true, 0, 0).setFont(new Font(
"Serif", Font.BOLD, 14));
System.out.println(cC.data[0][0].toString());
// .setFont(new Font("serif", Font.BOLD, 12));
gc
.println("There is a known bug with this program that if you enter any information in the table,");
gc
.println("then not confirming it by not going to another cell, then the data you've entered it not valid and not considered to be input,");
gc
.println("this will be fixed in future revisions if possible");
gc.show();
gc.setLocation(0, screensizey);
*bold*
*bold* c2.add(jp, "Center");
*bold*c2.add(new JScrollPane(jp,
*bold*ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED,
*bold*ScrollPaneConstants.HORIZONTAL_SCROLLBAR_AS_NEEDED),
*bold*"Center");
c1.setLayout(new GridLayout(2, 5));
c1.add(cConflict);
c1.add(find);
c1.add(quit);
c1.setVisible(true);
c2.setVisible(true);
c.add(c1, "South");
c.add(c2, "Center");
c.setVisible(true);
this.pack();
this.setTitle("Lancer's Class Conflict Checker");
this.setDefaultCloseOperation(EXIT_ON_CLOSE);
this.setSize(screensizex, screensizey);
RunOnce = true;
// ! this.pack(); //this tries to set the size of the thing to a
// perferred size, and if used will not alow the dynamic sizing
// of
// the
// main JTable window based on the user's screensize
public static void main(String[] args) {
ConflictCheckerGUIIntialization x = new ConflictCheckerGUIIntialization();
x.setVisible(true);
}here, the JPanel with the jtable is added to c2 and c2 is added to c and c's parent is the JFrame of this whole class
and the code for the jtable JPanel is:
package packageSolo;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import java.io.FileNotFoundException;
import javax.swing.*;
import javax.swing.table.*;
public class ConflictCheckerGUI extends JPanel {
private void debug(int x) {
// System.out.println(x);
protected static boolean finished = false;
protected static DefaultTableModel[][] data;
protected static int Classroomint = 0;
protected static JTable jtable;
protected static String[] columnNames = { "Classroom", "Period One",
"Period Two", "Period Three", "Period Four" };
protected static int GoAheadFlag = 0;
SetCellColour renderer;
public ConflictCheckerGUI() {
// super(new GridLayout(1, 0));
JFrame Choose = new JFrame();
Choose.setDefaultCloseOperation(Choose.EXIT_ON_CLOSE);
JButton ImportFromFile = new JButton("Impoort From File");
JButton New = new JButton("New Planner");
ImportFromFile.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent ae) {
String[] North;
String[] East;
String[] South;
String[] West;
String[] Month;
// JFileChooser fc = new JFileChooser();
// fc.show();
// int returnVal = fc.showOpenDialog(fc);
// File file = null;
// if (returnVal == JFileChooser.APPROVE_OPTION) {
// file = fc.getSelectedFile();
java.util.Scanner parse = null;
File file = new File(
"E://Documents and Settings//TheHolyLancer//My Documents//java - old//Eclipse workspace//Precipitation//packageSolo//datasave.txt");
try {
parse = new java.util.Scanner(file);
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
Classroomint = Integer.parseInt(parse.next());
North = new String[Classroomint];
East = new String[Classroomint];
South = new String[Classroomint];
West = new String[Classroomint];
Month = new String[Classroomint];
for (int counter1 = 0; counter1 < Classroomint; counter1++) {
Month[counter1] = "n/a";
for (int counter2 = 0; counter2 < Classroomint; counter2++) {
North[counter2] = "n/a";
East[counter2] = "n/a";
South[counter2] = "n/a";
West[counter2] = "n/a";
data = new DefaultTableModel[Classroomint][5];
jtable = new JTable(new DefaultTableModel(Classroomint,5));//columnnames
jtable.setPreferredScrollableViewportSize(new Dimension(800,
600));
finished = true;
New.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent ae) {
String input;
String[] North;
String[] East;
String[] South;
String[] West;
String[] Month;
int flag2 = 0;
int flag4 = 0;
int flag5 = 0;
int flag8 = 0;
input = JOptionPane
.showInputDialog("How many classromms are there?");
* see if the user wantes to quit at this point
if (input == null) {
debug(4);
int exitint = 0;
exitint = JOptionPane.showConfirmDialog(null,
"Do you want to exit?", "Exit?",
JOptionPane.OK_CANCEL_OPTION);
if (exitint == 0) {
try {
System.exit(1);
} catch (SecurityException eb) {
System.out.println("exit");
while (flag4 == 0) {
* this while loop with flag2 is for checking if the thing
* is of int class
while (flag2 == 0) {
* try to get a integer, check for a bad input class
try {
* parse, and if success set flag2 to 1 and break
* out this while loop
Classroomint = Integer.parseInt(input);
flag2 = 1;
debug(2);
} catch (NumberFormatException ec) {
debug(3);
* ops user input was not a integer class
JOptionPane.showMessageDialog(null,
"Enter a positive integer only",
"Number Format is Wrong",
JOptionPane.ERROR_MESSAGE);
input = JOptionPane
.showInputDialog("How many months are there?");
* see if the user wantes to quit at this point
if (input == null) {
debug(4);
int exitint = 0;
exitint = JOptionPane.showConfirmDialog(null,
"Do you want to exit?", "Exit?",
JOptionPane.OK_CANCEL_OPTION);
if (exitint == 0) {
try {
System.exit(1);
} catch (SecurityException eb) {
System.out.println("exit");
* this while loop sees if the integer is smaller than 0 so
* the array cannot be a real one
while (flag5 == 0) {
// numamountint = Integer.parseInt(numamount);
if (Classroomint < 0) {
debug(5);
JOptionPane.showMessageDialog(null,
"Enter a positive integer",
"Number Format/Size is Wrong",
JOptionPane.ERROR_MESSAGE);
input = JOptionPane
.showInputDialog("How many months are there?");
if (input == null) {
int exitint = 0;
exitint = JOptionPane.showConfirmDialog(null,
"Do you want to exit?", "Exit?",
JOptionPane.OK_CANCEL_OPTION);
if (exitint == 0) {
try {
System.exit(1);
} catch (SecurityException eb) {
System.out.println("exit");
* this while loop check for number format again
while (flag8 == 0) {
try {
debug(6);
Classroomint = Integer.parseInt(input);
flag8 = 1;
} catch (NumberFormatException ec) {
debug(7);
JOptionPane.showMessageDialog(null,
"Enter a positive integer only",
"Number Format is Wrong",
JOptionPane.ERROR_MESSAGE);
input = JOptionPane
.showInputDialog("How many months are there?");
if (input == null) {
int exitint = 0;
exitint = JOptionPane
.showConfirmDialog(
null,
"Do you want to exit?",
"Exit?",
JOptionPane.OK_CANCEL_OPTION);
if (exitint == 0) {
try {
System.exit(1);
} catch (SecurityException eb) {
System.out.println("exit");
} else {
* here the input is greater than 0 so it sets flag5
* and 4 then break out of the while loops
debug(8);
flag5 = 1;
flag4 = 1;
North = new String[Classroomint];
East = new String[Classroomint];
South = new String[Classroomint];
West = new String[Classroomint];
Month = new String[Classroomint];
for (int counter1 = 0; counter1 < Classroomint; counter1++) {
Month[counter1] = "n/a";
for (int counter2 = 0; counter2 < Classroomint; counter2++) {
North[counter2] = "n/a";
East[counter2] = "n/a";
South[counter2] = "n/a";
West[counter2] = "n/a";
DefaultTableModel tableModel = new DefaultTableModel(Classroomint, 0);
tableModel.addColumn("Classroom");
tableModel.addColumn("Period One");
tableModel.addColumn("Period Two");
tableModel.addColumn("Period Three");
tableModel.addColumn("Period Four");
/*protected static String[] columnNames = { "Classroom", "Period One",
"Period Two", "Period Three", "Period Four" };*/
// /jtable = new JTable(data, columnNames);
jtable = new JTable(tableModel) {
private static final long serialVersionUID = 1L;
public TableCellRenderer getCellRenderer(int row, int col) {
return renderer;
jtable.setRowSelectionAllowed(true);
jtable.setPreferredScrollableViewportSize(new Dimension(800,
600));
finished = true;
Container ButtonHolder = new Container();
ButtonHolder.setLayout(new GridLayout(1, 2));
ButtonHolder.add(New);
ButtonHolder.add(ImportFromFile);
Choose.add(ButtonHolder);
Choose.setSize(200, 300);
Choose.setVisible(true);
boolean RunOnce = false;
while (RunOnce == false) {
if (finished == true) {
//JScrollPane scrollPane = new JScrollPane(jtable);
this.add( jtable, BorderLayout.CENTER );
Choose.setEnabled(false);
RunOnce = true;
}but upon start, and select start new table, the windows come up, but on where the large JFrame is and where the jtable is, nothing appears, and it acts like a screen cap and the thing just stucks like what is on the background of the computer... i think in all this linking i may have screwed something up, and the examples given were not designed for JPanels, but rather for JFrames... maybe i could implement all this into one class, since the buttons for choosing from load from file and all that can be in the first file as another JFrame, that is first visible, then when user chose one, something becomes visible, or something
but anyone knows how to fix all this? -
: How to make a cell editable and uneditable in a JTable
i have created a table and want to make some modifications in the cells and also make it uneditable...i hace used abstract table model . kindly guide me
You have got to implement the 'isCellEditable' method within your abstract table model. If you want to allow the user to only edit cells in the first column you would add the following:
public boolean isCellEditable (int row, int col) {
if ( col == 0 ) {
return true
} else {
return false;
}That should be sufficent to base your own needs off.
Jon -
How to make a cell or column in JTable non focusable.
I have created a table which contains 2 rows and 2 columns. My requirement is that 2nd column should be non editable and non focusable. Making any cell non editable is very easy but how should i avoid focus on particular cell.i.e., suppose focus is on first cell and now if u press right arrow button on the keyboard 2nd cell should not get highlighted and focus should remain on first cell.
Thanks in advanceOverride the default Tab Action. Here is an example:
http://forum.java.sun.com/thread.jspa?forumID=57&threadID=657819 -
How to set JTable cell editable/non-editable dynamically using NetBean?
I am using NetBean 6.5, create a database desktop application, I using the persistence entity manager to bind my JTable with database.
Now, I want to set practicular cells which are enable and disable, I tried to create my own table model and override the isEditable() method, which it seems didn't work. I guessed the problem is the persistence connection between my Table and database.
How can I solve it? Any example? I just googled the web and can't find example which use netbean combined with database. I know that a single JTable would work when creating your own model.
thx.I know what coding i did, Yes u r right but im new to GUI programming only,
That's why i posted it to forums, I gone through the Control Flow Statements link what u have given.
U didnt get my question at all.
Again the problem im facing is the table is already displayed with 2nd column uneditable.
When some Action done on table, i need to make 2nd column editable at run time.
Thanks if u provide me the solution instead of deciding what type of programmer im.
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