How to add button in a row of JTable in Swing java

Question

Hello, I have made one swing GUI which have JTable with some rows and Columns.How should I add a button to row in a JTable ?

Answer 1

You don't add it to a row - you add it to the cell. This tutorial describes what you need

Answer 2

Table Button Column give one approach.

Answer 3

You can add Component as a table cell.

First of all, you should implement a class that have JButton as parent class and two interfaces that TableCellRenderer and TableCellEditor.

The reason that should implement TableCellEditor is for receiving button's ActionEvent.

public class TableButton extends JButton implements TableCellRenderer, TableCellEditor {
  private int selectedRow;
  private int selectedColumn;

  public TableButton(String text) {
    super(text); 
    addActionListener(new ActionListener() { 
      public void actionPerformed( ActionEvent e ) { 
        for(TableButtonListener l : listener) { 
          l.tableButtonClicked(selectedRow, selectedColumn);
      }
    });
  }

  public void addTableButtonListener( TableButtonListener l ) {
    listener.add(l);
  }

  public void removeTableButtonListener( TableButtonListener l ) { 
    listener.remove(l);
  }

  @Override 
  public Component getTableCellRendererComponent(JTable table,
    Object value, boolean isSelected, boolean hasFocus, int row, int col) {
    return this;
  }

  @Override
  public Component getTableCellEditorComponent(JTable table,
      Object value, boolean isSelected, int row, int col) {
    selectedRow = row;
    selectedColumn = col;
    return this;
  } 

  @Override
  public void addCellEditorListener(CellEditorListener arg0) {      
  } 

  @Override
  public void cancelCellEditing() {
  } 

  @Override
  public Object getCellEditorValue() {
    return "";
  }

  @Override
  public boolean isCellEditable(EventObject arg0) {
    return true;
  }

  @Override
  public void removeCellEditorListener(CellEditorListener arg0) {
  }

  @Override
  public boolean shouldSelectCell(EventObject arg0) {
    return true;
  }

  @Override
  public boolean stopCellEditing() {
    return true;
  }
}

Then, I added a EventListener named TableButtonListener for handling button event as following.

public interface TableButtonListener extends EventListener {
  public void tableButtonClicked( int row, int col );
}

And use above Renderer/Editor.

TableButton buttonEditor = new TableButton();
buttonEditor.addButtonListener(new TableButtonListener() {
  @Override
  public void tableButtonClicked(int row, int col) {
    // do something 
  }     
}); 

TableColumn col = new TableColumn(1, 80);
col.setCellRenderer(new TableButton());
col.setCellEditor(buttonEditor);

cols.addColumn(colPattern);

If you want to display different button's label for each row, you should insert code block into the getTableCellRendererComponent and getTableCellEditorComponent which is to modify button's label.