Thread: Command Line and two arguments

Simply put, i have to run my program from the command line

My code is:

public static void main( String[] args ) 
   {
 
      // check command-line arguments
      if ( args.length == 2 )
      {
         // get command-line arguments
         String databaseUserName = args[ 0 ];
         String databasePassword = args[ 1 ];
 
     // create new RestaurantBillCalculator
     RestaurantBillCalculator application = new RestaurantBillCalculator ( 
     databaseUserName, databasePassword );
 
      }
      else
      {
         System.out.println( "Usage: java " + 
            "RestaurantBillCalculator databaseUserName databasePassword" );
 
      }   
   } // end method main

Now everything works in Netbeans but running it from the command line, i get an error message ".java uses unchecked and unsafe operations"

I have added a bit more code to the code above

  for (int i = 0; i < args.length; i++) {
        System.out.println("args[" + i + "]: "
        + args[i]);
        }

Just not sure how to run it from the command line, help please

Originally Posted by Norm

What program are you trying to execute: javac or java
It would help if you copied the full contents of the command prompt window and pasted it here.

On Windows To copy the contents of the command prompt window:
Click on Icon in upper left corner
Select Edit
Select 'Select All' - The selection will show
Click in upper left again
Select Edit and click 'Copy'

Paste here.

Microsoft Windows [Version 6.1.7601]
Copyright (c) 2009 Microsoft Corporation. All rights reserved.

C:\Users\Sean\Documents\NetBeansProjects\Restauran tBillCalculator\src>javac Rest
aurantBillCalculator.java
Note: RestaurantBillCalculator.java uses unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.

C:\Users\Sean\Documents\NetBeansProjects\Restauran tBillCalculator\src>

So how do i write that in the command line? the way you have it exactly or what?

--- Update ---

If this is just a warning, why wont my code compile in the command line? i have 7 warnings but no errors in my netbeans project, all the warnings are "exception.printStackTrace

There is no errors, this is what i don't understand! the program runs fine in Netbeans but when i run it at the command line, it asks to recompile with -Xlint

Originally Posted by Norm

The IDE is ignoring the warnings. That can lead to problems when some of the warnings really effect how the code runs. For example try this statement: if( 2>1); using the -Xlint option gives this warning:
if(1 > 2); // warning: [empty] empty statement after if

Okay i got the list of what is wrong, and i get these warnings below

RestaurantBillCalculator.java:308: warning: [unchecked] unchecked call to addIte
m(E) as a member of the raw type JComboBox

RestaurantBillCalculator.java:569: warning: [unchecked] unchecked call to add(E)
as a member of the raw type ArrayList
billItems.add(( String ) beverageJComboBox.getSelectedItem() );

I believe i would have to go generic here?

Originally Posted by Norm

Yes, those look like missing generic code.

CAn you help me out with it? the first one i have my combobox called:

beverageJComboBox = new javax.swing.JComboBox();

Next one is:

private void beverageJComboBoxItemStateChanged( java.awt.event.ItemEvent event )
   {
      // select an item   
      if ( event.getStateChange() == java.awt.event.ItemEvent.SELECTED )   
      {   
         billItems.add(( String ) beverageJComboBox.getSelectedItem() );   
      }

Originally Posted by Norm

Take a look at the tutorial: Lesson: Generics (Updated) (The Java™ Tutorials > Learning the Java Language)

On it thanks

--- Update ---

Originally Posted by Norm

Take a look at the tutorial: Lesson: Generics (Updated) (The Java™ Tutorials > Learning the Java Language)

Hey can you you help me out with this one below, its the only one im stuck on and its doing my head in?

// set up beverageJComboBox
      beverageJComboBox = new javax.swing.JComboBox();
      beverageJComboBox.setEnabled( true ); 
      beverageJComboBox.setBounds( 88, 24, 128, 25 );
      menuItemsJPanel.add( beverageJComboBox );
      beverageJComboBox.addItemListener(
         new java.awt.event.ItemListener()  // anonymous inner class
         {
            // event handler called when item in beverageJComboBox
            // is selected
             @Override
            public void itemStateChanged( java.awt.event.ItemEvent event )
            {
               beverageJComboBoxItemStateChanged( event );
            }
         } // end anonymous inner class
      ); // end addItemListener
 
      // add items to beverageJComboBox
      beverageJComboBox.addItem( "" );   
      loadCategory( "Beverage", beverageJComboBox );

I have tried <String> <Number> <Integer>