import java.awt.* ;
import javax.swing.* ;              // TransferHandler
import java.awt.datatransfer.* ;    // DataFlavor , Transferable 
import java.io.* ; 

public class DropTest extends JFrame {

   JTextArea dropspot ;  // view dropped as String

   public DropTest() { 
      super("Drop Test") ; 
      dropspot = new JTextArea("Drop Stuff Here") ; 
      dropspot.setTransferHandler(new StringDropHandler()) ; 
      this.setLayout(new BorderLayout()) ; 
      this.getContentPane().add("Center", dropspot) ; 
      this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE) ; // exitExam()
      //this.setVisible(true) ; 
   }
                         
   public static void main(String[] args) { 
      DropTest dt = new DropTest() ; 
      dt.setSize(300,375) ; 
      dt.setLocation(500,500) ; 
      dt.setVisible(true) ; 
   } 


//inner class
/**
  *  StringDropHandler attemps to handle all
  *  dropped things which have a String representation.
  */
class StringDropHandler extends TransferHandler {
   /**
     *  Can attempt drop of anything.
     */
   public boolean canImport(JComponent comp, DataFlavor[] flavor) {
      return true ; 
   }

   /**
     *  Attempt import as string. 
     */
   public boolean importData(JComponent comp, Transferable t) {
      boolean flag = false ; // test importation
      try {  
         DataFlavor[] flavors = t.getTransferDataFlavors() ; 
         String s = "representationclass=java.lang.String" ;
         int p = -1 ;  // which is s?
         for(int i = 0 ; i < flavors.length ; i++) {
            // UNcomment next line to see flavors favoring String
            //System.out.println(flavors[i].toString()) ; 
            if (flavors[i].toString().indexOf(s) > -1) p = i ;
         }
         String content = ((String)t.getTransferData(flavors[p])).trim() ; 
         dropspot.setText(content) ; 
         //System.out.println(content) ; 
         flag = true ; // got it
      }
      // otherwise tell us what is wrong
      catch(Exception xx) { System.out.println(xx) ; }
      return flag ; 
   }

} // end inner StringDropHandler

} // end DropTest

/*
Mac drop source file:

file://localhost/wwwcpp/cs245/DropTest.java

Gnome drop source file:


*/