neue Klassen hinzugefügt, für Tests.

src/D_Test.java

@@ -1,7 +1,10 @@
-public class D_Test {
 import java.awt .*;
 import javax.swing .*;
 import java.awt.event .*;
+
+public class D_Test {
+
+
     public class NewStudent {
         public static void main(String[] args) {
             NewStudent st = new NewStudent();
@@ -47,3 +50,4 @@ import java.awt.event.*;
             });
         }
     }
+}dd