how to get the row and the column in a JTable when the cursor is pointed at a specific row?

Question

I am creating a table that contains a basic data , here is my frame

when i cl

Answer 1

What you can do is override the prepareRenderer method of the JTable and set a tool tip for each cell. Then use some html for the tool tip as seen in this answer from AndrewThompson

I use this image this url http://i.stack.imgur.com/Bbnyg.jpg from this site (this question), but you will probably want to use a resource from your system or class path and use toUri().toUrl() to create the url. In any case, the html needs to consist of a URL in the . You can switch them based on the row/column value.

Here is the example.

import java.awt.Component;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.SwingUtilities;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableCellRenderer;

public class TestTableTooltip {

    String html
            = ""
            + " ";

    public TestTableTooltip() {
        String[] cols = {"COL", "COL", "COL"};
        String[][] data = {
            {"Hello", "Hello", "Hello"},
            {"Hello", "Hello", "Hello"},
            {"Hello", "Hello", "Hello"}
        };
        DefaultTableModel model = new DefaultTableModel(data, cols);
        JTable table = new JTable(model) {
            public Component prepareRenderer(TableCellRenderer renderer, int row, int column) {
                Component c = super.prepareRenderer(renderer, row, column);
                if (c instanceof JComponent) {
                    JComponent jc = (JComponent) c;
                    jc.setToolTipText(html + "
"
                        + getValueAt(row, column).toString()
                        + ":  row, col (" + row + ", " + column + ")"
                        + "");
                }
                return c;
            }
        };

        JFrame frame = new JFrame();
        frame.add(new JScrollPane(table));
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.pack();
        frame.setLocationRelativeTo(null);
        frame.setVisible(true);
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                new TestTableTooltip();
            }
        });
    }
}

---

UPDATE

You can get a url from a resource (in your class path) like this

  URL url = getClass().getResource("/path/to/image.png");
  final String html
        = ""
        + " ";

If it is a file from the file system, you can do this

  URL url = new File("path/to/image.png").toURI().toURL();