JTable:如何获取选定的单元格？

Question

我有一个JTable及其TableModel,它运行良好,但我现在要做的是获取它的选定单元格.我想过做的事情:

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() //...
    }
}

但当然这样的事情不存在.我该怎么做呢？

Answer 1

在JTable中,你有

JTable.getSelectedRow()

和

JTable.getSelectedColumn()

您可以尝试将此两种方法与MouseListener和KeyListener结合使用.使用KeyListener,您可以检查用户是否按下CTRL键,这意味着用户正在选择单元格,然后使用鼠标侦听器,对于您存储的每个单击,可能在Vector或ArrayList中选择单元格:

//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);
}

Answer 2

table.getSelectedRow()将获得选定的行.

table.getSelectedColumns()将获得选定的列.

getValueAt(rowIndex,columnIndex)将给出每列所选行的值.