I added columns on code:
String[] titles = {"Nazwa", "Uzytkownik", "Haslo"};
for(int i=0; i<titles.length; i++){
TableColumn column = new TableColumn(table, SWT.NULL);
column.setText(titles[i]);
}
Next, I added items to said columns:
String[][] a = new String[passwords.length][3];
for(int i=0; i<passwords.length; i++){
a[i] = passwords[i].split(":");
}
for(int i=0; i<passwords.length; i++){
TableItem item = new TableItem(table, SWT.NULL);
//item.setText(Integer.toString(i));
for(int j=0; j<a[i].length; j++){
item.setText(j, a[i][j]);
}
}
Now, I want get selected items from the second column.
I added TableCursor and KeyListener:
tableCursor.addKeyListener(new KeyAdapter() {
#Override
public void keyPressed(KeyEvent e) {
if(e.character == 'c') {
Point p = tableCursor.getLocation();
//for(int i=0; i<selection.length; i++){
TableItem item = table.getItem(p);
if(item != null){
MessageBox message = new MessageBox(shell, SWT.ICON_ERROR);
message.setMessage(item.toString());
message.open();
}
}
}
});
And now, for example, when I select item from the second column, it doesn't see anything from the second column, only item from the first column. What's the problem?
The problem is the way you try to find the selected item/column in the table.
Here is an example that does exactly what you want:
public static void main(String[] args)
{
Display display = Display.getDefault();
final Shell shell = new Shell(display);
shell.setLayout(new FillLayout());
final Table table = new Table(shell, SWT.NONE);
table.setHeaderVisible(true);
/* Create columns */
for (int i = 0; i < 3; i++)
{
TableColumn col = new TableColumn(table, SWT.NONE);
col.setText("Col " + i);
}
/* Create items */
for (int i = 0; i < 10; i++)
{
TableItem item = new TableItem(table, SWT.NONE);
item.setText(new String[] { "Row" + i + "Col1", "Row" + i + "Col2", "Row" + i + "Col3" });
}
/* Pack columns */
for (int i = 0; i < 3; i++)
{
table.getColumn(i).pack();
}
table.addListener(SWT.MouseUp, new Listener()
{
#Override
public void handleEvent(Event event)
{
Point pt = new Point(event.x, event.y);
TableItem item = table.getItem(pt);
if (item != null)
{
/* Iterate over all columns and check if event is contained */
for (int col = 0; col < table.getColumnCount(); col++)
{
Rectangle rect = item.getBounds(col);
if (rect.contains(pt))
{
System.out.println(item.getText(col));
}
}
}
}
});
shell.pack();
shell.open();
while (!shell.isDisposed())
{
if (!display.readAndDispatch())
display.sleep();
}
display.dispose();
}
Related
I tried to make a simple GUI where I can add the First/Last Name of a person and their date of birth. After adding the data to the JTable I can save it in a TxT File and Load it back into the JTable again.
Part where Data is saved:
private void saveListener(){
jb1.addActionListener(e -> {
JFileChooser fileChooser = new JFileChooser();
int returnVal = fileChooser.showSaveDialog(PeopleGUI.this);
if (returnVal == JFileChooser.APPROVE_OPTION) { // Datei Explorer
try {
File file = fileChooser.getSelectedFile();
PrintWriter o = new PrintWriter(file); // o steht für Output
for (int col = 0; col < peopleModel.getColumnCount(); col++) {
o.print(peopleModel.getColumnName(col) + ";");
}
o.println("");
for (int row = 0; row < peopleModel.getRowCount(); row++) {
for (int col = 0; col < peopleModel.getColumnCount(); col++) {
o.println(peopleModel.getValueAt(row, col));
}
}
o.close();
// Output in der Konsole
System.out.println("Success!");
} catch (IOException c) {
c.printStackTrace();
}
}
});
}
Part where Data is loaded:
public void loadListener() {
jb2.addActionListener(e -> {
final JFileChooser fileChooser = new JFileChooser();
int response = fileChooser.showOpenDialog(PeopleGUI.this);
if (response == JFileChooser.APPROVE_OPTION) {
try {
BufferedReader br = new BufferedReader(new FileReader("jlist.txt"));
// Erste Linie sind Kolonnen Beschriftungen
String firstLine = br.readLine().trim();
String[] columnsName = firstLine.split(";");
DefaultTableModel model = (DefaultTableModel) peopleList.getModel();
model.setColumnIdentifiers(columnsName);
// Daten vom TxT holen
Object[] tableLines = br.lines().toArray();
// Reihen mit Daten
for (int i = 0; i < tableLines.length; i++) {
String line = tableLines[i].toString().trim();
String[] dataRow = line.split("/");
model.addRow(dataRow);
}
}
catch (IOException b) {
b.printStackTrace();
}
}
});
}
The problem is, that the imported data is only showing in the first row:
This is how it looks right now
Does anyone now how to fix this issue?
Thanks in advance!
The problem is how you save your data to a file
for (int row = 0; row < peopleModel.getRowCount(); row++) {
for (int col = 0; col < peopleModel.getColumnCount(); col++) {
o.println(peopleModel.getValueAt(row, col));
}
}
Here you save each cell of the JTable in a new line. You want to save each row in a new line with values separated by /
for (int row = 0; row < peopleModel.getRowCount(); row++) {
String r = "";
for (int col = 0; col < peopleModel.getColumnCount(); col++) {
r += peopleModel.getValueAt(row, col);
if (col < peopleModel.getColumnCount() - 1) {
r += "/";
}
}
o.println(r);
}
EDIT: As #camickr stated use StringJoiner is better
for (int row = 0; row < peopleModel.getRowCount(); row++) {
StringJoiner stringJoiner = new StringJoiner("/");
for (int col = 0; col < peopleModel.getColumnCount(); col++) {
stringJoiner.add(peopleModel.getValueAt(row, col).toString());
}
o.println(stringJoiner.toString());
}
How can I "refresh" my table, so that I could display same table with different data?
String columnNames[] = {"First Name", "Last Name", "Phone Number", "E-mail"};
JTable contactTable = new JTable(data, columnNames);
jScrollPane = new JScrollPane(contactTable,JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
where is your data saved ?
i save it in a text file and use this way to refresh my data but you need a button to refresh every time
here is my code
private void jButton2ActionPerformed(java.awt.event.ActionEvent evt) {
// Refresh Button
try {
for (int r = 0; r < 100; r++) { //initializing row
for (int c = 0; c < 4; c++) { //initializing column
jTable1.setValueAt(null, r, c);
}
}
BufferedReader rdfile = new BufferedReader(new FileReader("items.txt"));
String[] item = new String[100];
String[] temp;
int x = 0; //read item
while ((item[x] = rdfile.readLine()) != null) {
temp = item[x].split("\t");
jTable1.setValueAt((1000 + x + 1), x, 0);
for (int j = 1; j < 4; j++) {
jTable1.setValueAt(temp[j - 1], x, j);
}
x++;
}
rdfile.close();
} catch (IOException e) {
}
}
I have made a GUI using swing, i read data from a text file to the jtable,
the text file has 6 columns and 5 rows,the 3 row has values 0,0.0,0,0,0,0.so i want to display
values in the JTable till it encounters 0.but to save the full text file while saving which means values of 5 rows.here is my code:
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
{
private JTable table;
private DefaultTableModel model;
#SuppressWarnings("unchecked")
public Bb()
{
String aLine ;
Vector columnNames = new Vector();
Vector data = new Vector();
try
{
FileInputStream fin = new FileInputStream("Bbb.txt");
BufferedReader br = new BufferedReader(new InputStreamReader(fin));
StringTokenizer st1 = new StringTokenizer(br.readLine(), " ");
while( st1.hasMoreTokens())
{
columnNames.addElement(st1.nextToken());
}
while ((aLine = br.readLine()) != null )
{
StringTokenizer st2 = new StringTokenizer(aLine, " ");
Vector row = new Vector();
while(st2.hasMoreTokens())
{
row.addElement(st2.nextToken());
}
data.addElement( row );
}
br.close();
}
catch (Exception e)
{
e.printStackTrace();
}
model = new DefaultTableModel(data, columnNames);
table = new JTable(model);
JScrollPane scrollPane = new JScrollPane( table );
getContentPane().add( scrollPane );
JPanel buttonPanel = new JPanel();
getContentPane().add( buttonPanel, BorderLayout.SOUTH );
JButton button2 = new JButton( "SAVE TABLE" );
buttonPanel.add( button2 );
button2.addActionListener( new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
if ( table.isEditing() )
{
int row = table.getEditingRow();
int col = table.getEditingColumn();
table.getCellEditor(row, col).stopCellEditing();
}
int rows = table.getRowCount();
int columns = table.getColumnCount();
try {
StringBuffer Con = new StringBuffer();
for (int i = 0; i < table.getRowCount(); i++)
{
for (int j = 0; j < table.getColumnCount(); j++)
{
Object Value = table.getValueAt(i, j);
Con.append(" ");
Con.append(Value);
}
Con.append("\r\n");
}
FileWriter fileWriter = new FileWriter(new File("cc.txt"));
fileWriter.write(Con.toString());
fileWriter.flush();
fileWriter.close();
}
catch (Exception ex) {
ex.printStackTrace();
}
}
});
}
public static void main(String[] args)
{
Bb frame = new Bb();
frame.setDefaultCloseOperation( EXIT_ON_CLOSE );
frame.pack();
frame.setVisible(true);
}
}
and the text file:
1 2 6 0.002 0.00 2
2 5 5 0.005 0.02 4
0 0 0 0.000 0.00 0
4 8 9 0.089 0.88 7
5 5 4 0.654 0.87 9
I was able to understand what you want
For first part that you just wanted to show your data in your JTable till you encounter 0
code:
while ((aLine = br.readLine()) != null) {
String[] sp = aLine.split(" ");
if (sp[0].equals("0")) {
break;
}
StringTokenizer st2 = new StringTokenizer(aLine, " ");
Vector row = new Vector();
while (st2.hasMoreTokens()) {
String s = st2.nextToken();
row.addElement(s);
}
data.addElement(row);
}
Explanation: when you read each line, split it, so if the first element of each splitted line is zero, you come out of the loop and do not show any other values inside the loop.
For saving all your data from first file to second file, you should copy them from first file to second file because your JTable will not have enough info to help your purpose in this matter.
Note: I do not understand why you want to do this but you can accomplish that in following way
Code:
button2.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
if (table.isEditing()) {
int row = table.getEditingRow();
int col = table.getEditingColumn();
table.getCellEditor(row, col).stopCellEditing();
}
int rows = table.getRowCount();
int columns = table.getColumnCount();
try {
String st = "";
FileInputStream fin = new FileInputStream("C:\\Users\\J Urguby"
+ "\\Documents\\NetBeansProjects\\Bb\\src\\bb\\Bbb.txt");
Scanner input = new Scanner(fin).useDelimiter("\\A");
while (input.hasNext()) {
st = input.next();
System.out.println("st is " + st);
}
FileWriter fileWriter = new FileWriter(new File("C:\\Users\\J Urguby"
+ "\\Documents\\NetBeansProjects\\Bb\\src\\bb\\cc.txt"));
fileWriter.write(st);
fileWriter.flush();
fileWriter.close();
} catch (Exception ex) {
ex.printStackTrace();
}
}
});
Explanation: you read the whole file with Scanner trick and write it down into a second file.
Source: https://weblogs.java.net/blog/pat/archive/2004/10/stupid_scanner.html
Based on what the OP requested
Code:
public Bb() {
String aLine;
Vector columnNames = new Vector();
Vector data = new Vector();
boolean found = false;
StringBuilder temp = new StringBuilder();
/*Using try catch block with resources Java 7
Read about it
*/
try (FileInputStream fin = new FileInputStream("C:\\Users\\8888"
+ "\\Documents\\NetBeansProjects\\Bb\\src\\bb\\Bbb.txt");
BufferedReader br = new BufferedReader(new InputStreamReader(fin))) {
StringTokenizer st1 = new StringTokenizer(br.readLine(), " ");
//the first line of the txt file fill colum names
while (st1.hasMoreTokens()) {
String s = st1.nextToken();
columnNames.addElement(s);
}
while ((aLine = br.readLine()) != null) {
String[] sp = aLine.split(" ");
if (sp[0].equals("0") && !found) {
found = true;
} else if (found) {
temp.append(aLine).append("\r\n");
} else if (!sp[0].equals("0") && !found) {
StringTokenizer st2 = new StringTokenizer(aLine, " ");
Vector row = new Vector();
while (st2.hasMoreTokens()) {
String s = st2.nextToken();
row.addElement(s);
}
data.addElement(row);
}
}
} catch (IOException e) {
e.printStackTrace();
}
model = new DefaultTableModel(data, columnNames);
table = new JTable(model);
JScrollPane scrollPane = new JScrollPane(table);
getContentPane().add(scrollPane);
JPanel buttonPanel = new JPanel();
getContentPane().add(buttonPanel, BorderLayout.SOUTH);
JButton button2 = new JButton("SAVE TABLE");
buttonPanel.add(button2);
button2.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
if (table.isEditing()) {
int row = table.getEditingRow();
int col = table.getEditingColumn();
table.getCellEditor(row, col).stopCellEditing();
}
int rows = table.getRowCount();
int columns = table.getColumnCount();
try {
StringBuilder con = new StringBuilder();
for (int i = 0; i < table.getRowCount(); i++) {
for (int j = 0; j < table.getColumnCount(); j++) {
Object Value = table.getValueAt(i, j);
con.append(" ");
con.append(Value);
}
con.append("\r\n");
}
try (FileWriter fileWriter = new FileWriter(new File("C:\\Users\\8888"
+ "\\Documents\\NetBeansProjects\\Bb\\src\\bb\\cc.txt"))) {
fileWriter.write(con.append(temp).toString());
fileWriter.flush();
}
} catch (IOException ex) {
ex.printStackTrace();
}
}
});
}
My code just works if you have row includes zeros. if you want to make it better to cover up all conditions, I am sure you can follow my plan.
Sample to get rid of all zeros like
1 1 1
0 0 0
0 0 0
1 1 1
Code:
String s = "xxxooooooxxx";
String[] sp = s.split("");
boolean xFlag = false;
for (int i = 0; i < sp.length; i++) {
if (sp[i].equals("x") && !xFlag) {
System.out.print("x");
} else if (sp[i].equals("o")) {
xFlag = true;
} else if (sp[i].equals("x") && xFlag) {
System.out.print("X");
}
}
output:
xxxXXX
Can someone explain what is wrong with my code ?
I want to create a simple swt table.
Eclipse notice that TableColumn is undefined:
TableColumn column = new TableColumn(table, SWT.NONE);
Here is the complete Code:
Shell shell = new Shell();
shell.setSize(280, 300);
shell.setText("Testtabelle");
Table table = new Table(shell, SWT.MULTI | SWT.BORDER
| SWT.FULL_SELECTION);
table.setLinesVisible(true);
table.setHeaderVisible(true);
String[] titles = { " ", "C", "!", "Description", "Resource", "In Folder", "Location" };
for (int i = 0; i < titles.length; i++) {
TableColumn column = new TableColumn(table, SWT.NONE);
column.setText(titles[i]);
}
int count = 128;
for (int i = 0; i < count; i++) {
TableItem item = new TableItem(table, SWT.NONE);
item.setText(0, "x");
item.setText(1, "y");
item.setText(2, "!");
item.setText(3, "this stuff behaves the way I expect");
item.setText(4, "almost everywhere");
item.setText(5, "some.folder");
item.setText(6, "line " + i + " in nowhere");
}
for (int i = 0; i < titles.length; i++) {
table.getColumn(i).pack();
}
table.setSize(table.computeSize(SWT.DEFAULT, 200));
shell.pack();
shell.open();
Make sure that you import the correct TableColumn. In your case, this will be:
org.eclipse.swt.widgets.TableColumn
Also make sure that you don't import any other TableColumn if you don't need it. A popular example would be:
javax.swing.table.TableColumn
This question already has answers here:
Closed 11 years ago.
Possible Duplicate:
JTable Scrolling to a specified row index
I have a JTable and I programmatically need to select a row by using this code:
myTable.setRowSelectionInterval(i, j);
(where i and j are valid row and column numbers respectively).
The problem is, when you jump to a row, the JScrollPane does not move.
In this case, the table is quite long, and often the "selected row" is not visible on the screen, so the user has to stay scrolling up/down manually to find it. I would like to know how I can make the JScrollPane automatically jump to the specific location of the row.
Edit: Found this one liner which can do it:
table.scrollRectToVisible(table.getCellRect(row,0, true));
just extends post by #Eng.Fouad +1, no works as I exactly expected (with kind help by StanislavL from another Java Swing forum)
import java.awt.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.table.DefaultTableModel;
public class TableSelectionGood implements ListSelectionListener {
private JTable[] tables;
private boolean ignore = false;
public TableSelectionGood() {
Object[][] data1 = new Object[100][5];
Object[][] data2 = new Object[50][5];
Object[][] data3 = new Object[50][5];
for (int i = 0; i < data1.length; i++) {
data1[i][0] = "Company # " + (i + 1);
for (int j = 1; j < data1[i].length; j++) {
data1[i][j] = "" + (i + 1) + ", " + j;
}
}
for (int i = 0; i < data2.length; i++) {
data2[i][0] = "Company # " + ((i * 2) + 1);
for (int j = 1; j < data2[i].length; j++) {
data2[i][j] = "" + ((i * 2) + 1) + ", " + j;
}
}
for (int i = 0; i < data3.length; i++) {
data3[i][0] = "Company # " + (i * 2);
for (int j = 1; j < data3[i].length; j++) {
data3[i][j] = "" + (i * 2) + ", " + j;
}
}
String[] headers = {"Col 1", "Col 2", "Col 3", "Col 4", "Col 5"};
DefaultTableModel model1 = new DefaultTableModel(data1, headers);
DefaultTableModel model2 = new DefaultTableModel(data2, headers);
DefaultTableModel model3 = new DefaultTableModel(data3, headers);
final JTable jTable1 = new JTable(model1);
jTable1.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
final JScrollPane sp1 = new JScrollPane();
sp1.setPreferredSize(new Dimension(600, 200));
sp1.setViewportView(jTable1);
final JTable jTable2 = new JTable(model2);
jTable2.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
final JScrollPane sp2 = new JScrollPane();
sp2.setPreferredSize(new Dimension(600, 200));
sp2.setViewportView(jTable2);
final JTable jTable3 = new JTable(model3);
jTable3.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
final JScrollPane sp3 = new JScrollPane();
sp3.setPreferredSize(new Dimension(600, 200));
sp3.setViewportView(jTable3);
TableSelectionGood tableSelection = new TableSelectionGood(jTable1, jTable2, jTable3);
JPanel panel1 = new JPanel();
panel1.setLayout(new GridLayout(3, 0, 10, 10));
panel1.add(sp1);
panel1.add(sp2);
panel1.add(sp3);
JFrame frame = new JFrame("tableSelection");
frame.add(panel1);
frame.pack();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
public TableSelectionGood(JTable... tables) {
for (JTable table : tables) {
table.getSelectionModel().addListSelectionListener(this);
}
this.tables = tables;
}
private JTable getTable(Object model) {
for (JTable table : tables) {
if (table.getSelectionModel() == model) {
return table;
}
}
return null;
}
private void changeSelection(JTable table, String rowKey) {
int col = table.convertColumnIndexToView(0);
for (int row = table.getRowCount(); --row >= 0;) {
if (rowKey.equals(table.getValueAt(row, col))) {
table.changeSelection(row, col, false, false);
return;
}
}
table.clearSelection();
}
#Override
public void valueChanged(ListSelectionEvent e) {
if (e.getValueIsAdjusting() || ignore) {
return;
}
ignore = true;
try {
JTable table = getTable(e.getSource());
int row = table.getSelectedRow();
String rowKey = table.getValueAt(row, table.convertColumnIndexToView(0)).toString();
for (JTable t : tables) {
if (t == table) {
continue;
}
changeSelection(t, rowKey);
JViewport viewport = (JViewport) t.getParent();
Rectangle rect = t.getCellRect(t.getSelectedRow(), 0, true);
Rectangle r2 = viewport.getVisibleRect();
t.scrollRectToVisible(new Rectangle(rect.x, rect.y, (int) r2.getWidth(), (int) r2.getHeight()));
System.out.println(new Rectangle(viewport.getExtentSize()).contains(rect));
}
} finally {
ignore = false;
}
}
public static void main(String[] args) {
TableSelectionGood tableSelection = new TableSelectionGood();
}
}
I used this in my old project:
public static void scrollToVisible(JTable table, int rowIndex, int vColIndex)
{
if (!(table.getParent() instanceof JViewport)) return;
JViewport viewport = (JViewport)table.getParent();
Rectangle rect = table.getCellRect(rowIndex, vColIndex, true);
Point pt = viewport.getViewPosition();
rect.setLocation(rect.x-pt.x, rect.y-pt.y);
viewport.scrollRectToVisible(rect);
}
Reference: http://www.exampledepot.com/egs/javax.swing.table/Vis.html