listtest.java

这个程序是为了更好的理解

// Fig. 20.5: ListTest.java
// ListTest class to demonstrate List capabilities.
import com.deitel.jhtp5.ch20.List;
import com.deitel.jhtp5.ch20.EmptyListException;

public class ListTest {

   public static void main( String args[] )
   {
      List list = new List();  // create the List container

      // objects to store in list
      Boolean bool = Boolean.TRUE;
      Character character = new Character( '$' );
      Integer integer = new Integer( 34567 );
      String string = "hello";
      Object data = "fuck";

      // insert references to objects in list
      list.insertAtFront( bool );
      list.print();
      list.insertAtFront( character );
      list.print();
      list.insertAtBack( integer );
      list.print();
      list.insertAtBack( string );
      list.print();
      list.insertAtMiddle(4,data);
      list.print();

      // remove objects from list; print after each removal
      try { 
        Object removedObject = list.removeBydata(bool);
        System.out.println( removedObject.toString() + " removed" );
        list.print();
    	  
    	  list.removeByindex(3);
          list.print();
//         Object removedObject = list.removeFromFront();
//         System.out.println( removedObject.toString() + " removed" );
//         list.print();
//
//         removedObject = list.removeFromFront();
//         System.out.println( removedObject.toString() + " removed" );
//         list.print();
//
//         removedObject = list.removeFromBack();
//         System.out.println( removedObject.toString() + " removed" );
//         list.print();
//
//         removedObject = list.removeFromBack();
//         System.out.println( removedObject.toString() + " removed" );
//         list.print();

      } // end try block

      // catch exception if remove is attempted on an empty List 
      catch ( EmptyListException emptyListException ) {
         emptyListException.printStackTrace();
      }
   }

} // end class ListTest


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