CODEWITHSUNDEEP
swingjtablecellselected
Rob
Rob

Reputation: 15982

JTable : how to get selected cells?

I have a JTable and its TableModel, it works well but what I want to do now is to get the selected cells of it. I thought of doing something like :

int rows = this.getTable().getRowCount();
int columns = this.getTable().getColumnCount();
for(int i = 0 ; i < rows ; i++)
{
    for(int j = 0 ; j < columns ; j++)
    {
         if(table.getCell(i,j).isSelected() //...
    }
}

But of course something like this doesn't exist. What should I do instead?

Upvotes: 10

Views: 61030

Answers (4)

Fred Brasil
Fred Brasil

Reputation: 29

You can use:

int row = table.rowAtPoint(e.getPoint());
int col = table.columnAtPoint(e.getPoint());

You can get the row and column with ( table.getSelectedRow() and table.getSelectedColumn()) but if you selected more than one cell the method table.getSelectedRow() and table.getSelectedColumn() return cell's position of the first cell that was clicked.

On the other hand, table.rowAtPoint(e.getPoint()) and table.columnAtPoint(e.getPoint()) return the exact cell's table that was clicked for the last time.

Upvotes: 0

BackSlash
BackSlash

Reputation: 22233

In JTable, you have the

JTable.getSelectedRow()

and

JTable.getSelectedColumn()

You can try combine this two method with a MouseListener and a KeyListener. With the KeyListener you check if user is pressing the CTRL key, which means that user is selecting cells, then with a mouse listener, for every click you store maybe in a Vector or ArrayList the selected cells:

//global variables
JTable theTable = new JTable();//your table
boolean pressingCTRL=false;//flag, if pressing CTRL it is true, otherwise it is false.
Vector selectedCells = new Vector<int[]>();//int[]because every entry will store {cellX,cellY}

public void something(){
   KeyListener tableKeyListener = new KeyAdapter() {

      @Override
      public void keyPressed(KeyEvent e) {
         if(e.getKeyCode()==KeyEvent.VK_CTRL){//check if user is pressing CTRL key
            pressingCTRL=true;
         }
      }

      @Override
      public void keyReleased(KeyEvent e) {
         if(e.getKeyCode()==KeyEvent.VK_CTRL){//check if user released CTRL key
            pressingCTRL=false;
         }
      }
   };

   MouseListener tableMouseListener = new MouseAdapter() {

      @Override
      public void mouseClicked(MouseEvent e) {
         if(pressingCTRL){//check if user is pressing CTRL key
            int row = theTable.rowAtPoint(e.getPoint());//get mouse-selected row
            int col = theTable.columnAtPoint(e.getPoint());//get mouse-selected col
            int[] newEntry = new int[]{row,col};//{row,col}=selected cell
            if(selectedCells.contains(newEntry)){
               //cell was already selected, deselect it
               selectedCells.remove(newEntry);
            }else{
               //cell was not selected
               selectedCells.add(newEntry);
            }
         }
      }
   };
   theTable.addKeyListener(tableKeyListener);
   theTable.addMouseListener(tableMouseListener);
}

Upvotes: 24

Amarnath
Amarnath

Reputation: 8855

table.getSelectedRow() will get selected row.

table.getSelectedColumns() will get selected columns.

getValueAt(rowIndex, columnIndex) will give the value present at the selected row for each column.

Upvotes: 7

sbridges
sbridges

Reputation: 25140

JTable has methods to get the selected rows and get the selected columns.

Upvotes: 3

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