Question

I’d like to drag and drop external files (e.g. from windows explorer) into a JTable. Anybody got some example code as how this is done?

Answer 1

Simply use the DropTarget class to receive drop events. You can distinguish between drops into the current table (available columns/rows) and into the scroll pane (to e.g. add new rows)

import java.awt.BorderLayout; import java.awt.Point; import java.awt.dnd.DropTarget; import java.awt.dnd.DropTargetDropEvent;  import javax.swing.JFrame; import javax.swing.JScrollPane; import javax.swing.JTable; import javax.swing.table.DefaultTableModel;   public class SwingTest extends JFrame{     private JTable table = new JTable();     private JScrollPane scroll = new JScrollPane(table);     private DefaultTableModel tm = new DefaultTableModel(new String[]{'a','b','c'},2);      public SwingTest() {         table.setModel(tm);         table.setDropTarget(new DropTarget(){             @Override             public synchronized void drop(DropTargetDropEvent dtde) {                 Point point = dtde.getLocation();                 int column = table.columnAtPoint(point);                 int row = table.rowAtPoint(point);                 // handle drop inside current table                 super.drop(dtde);             }         });         scroll.setDropTarget(new DropTarget(){             @Override             public synchronized void drop(DropTargetDropEvent dtde) {                 // handle drop outside current table (e.g. add row)                 super.drop(dtde);             }         });         this.getContentPane().setLayout(new BorderLayout());         this.getContentPane().add(scroll);         this.setDefaultCloseOperation(EXIT_ON_CLOSE);         this.setSize(800,600);         this.setVisible(true);     }      public static void main(String[] args) {         new SwingTest();     } }