//  Javatests.java  (c) 2004 Kari Laitinen

//  http://www.naturalprogramming.com

//  2005-04-05  File created.
//  2005-08-09  Last modification.

//  This file has been used to write short programs that
//  test various Java features. The test programs are put to
//  comments after they a no longer needed.

import java.util.* ;


class Javatests
{
   public static void main( String[] not_in_use )
   {
   }
}



/*******


class  SomeClass
{
   int     some_integer_field  =  9 ;
   double  some_number         =  33.44 ;
   String  some_string_field   =  "initial text" ;
   int[]   some_integer_array  =  { 66, 77, 88 } ;

   public SomeClass( int  given_value  )
   {
      some_integer_array[ 1 ]  =  given_value ;
   }

   public SomeClass()
   {
      this( 33 ) ;
      System.out.print( "\n Default constructor executed." ) ;
   }
   
   public void print()
   {
      System.out.print( "\n array element: " 
                     +  some_integer_array[ 1 ] ) ;
      System.out.print( "\n string "  +  some_string_field ) ;
   }
}


class Javatests
{
   public static void main( String[] not_in_use )
   {
      Scanner  keyboard  =  new Scanner( System.in ) ;

      SomeClass  some_object  =  new  SomeClass() ;

      some_object.print() ;

      Calendar  birth_of_winston_churchill  =
                      new  GregorianCalendar( 1874, 10, 30 ) ;
      Calendar  birth_of_charles_darwin  =
          new  GregorianCalendar( 1809, 1, 9, 14, 39, 48 ) ;

      System.out.printf( "\n %tc",  birth_of_winston_churchill  )  ;
      System.out.printf( "\n %tc",  birth_of_charles_darwin  )  ;

   }
}


   public static void main( String[] not_in_use )
   {
      Scanner  keyboard  =  new Scanner( System.in ) ;

      //System.out.print( "\n Give a hexadecimal number: " ) ;
      //String given_number_as_string  = keyboard.nextLine() ;
      //int integer_from_keyboard  =
      //       Integer.parseInt( given_number_as_string, 16 ) ;
      //System.out.print( "\n " + integer_from_keyboard ) ;

      SomeClass  some_object  =  new  SomeClass() ;

      System.out.print( "" + some_object  +  "\n" ) ;

      String hexadecimal_string  =  String.format( "%X", 33 );
      //  String hexadecimal_string  =  Integer.toHexString( 33 );
      System.out.print( hexadecimal_string ) ;
      System.out.print( "\n " + Integer.parseInt( "123" )
              +  "   " + Integer.parseInt( "1111011", 2 ) 
              +  "   " + Integer.parseInt( "7B", 16 ) ) ; 


      String  value_of_pi_as_string  =  "3.14159" ;
      double  value_of_pi  =
                  Double.valueOf( value_of_pi_as_string ) ;
      //  double  value_of_pi  =
      //             Double.parseDouble( value_of_pi_as_string ) ;

      System.out.print( "\n\n  "  +  value_of_pi  +  "\n\n  ") ;


      long  some_long  =  999 ;

      int some_int  =  (int) some_long ;

      char  some_character  =  'A' ;

      System.out.print( (int) some_character ) ;
   }


   public static void main( String[] not_in_use )
   {
      Scanner  keyboard  =  new Scanner( System.in ) ;

      int some_integer  =  112 ;
      int some_other_integer  =  622 ;

      System.out.printf( "\n" ) ;

      System.out.printf( "The value is %d.", some_integer ) ;

      System.out.printf( "\n" ) ;


      System.out.printf( "The values are %d and %d.",
                         some_integer, some_other_integer ) ;

      System.out.printf( "\n" ) ;

      System.out.printf( "%1$d is %1$d, but %1$d is not %2$d",
                         some_integer, some_other_integer ) ;

      System.out.printf( "\n" ) ;
      System.out.printf( " %1$d is %1$d.", some_integer ) ;


   }

   public static void main( String[] not_in_use )
   {
      Scanner  keyboard  =  new Scanner( System.in ) ;

      int sum_of_integers = 0 ;

      boolean user_wants_to_stop_entering_numbers = false ;

      while ( user_wants_to_stop_entering_numbers == false )
      {
         System.out.print( "\n Give a number: " ) ;
         int integer_from_keyboard  =  keyboard.nextInt() ;
         if ( integer_from_keyboard  ==  9999 )
         {
            user_wants_to_stop_entering_numbers = true ;
         }
         else
         {
            sum_of_integers  =
                     sum_of_integers + integer_from_keyboard ;
         }
      }

      System.out.print( "\n  The sum is " + sum_of_integers ) ;




      System.out.print( "\n Enter a character and press Enter: " ) ;

      char character_from_keyboard = keyboard.nextLine().charAt( 0 ) ;

      System.out.print( "\n The code of the character "
                     +  character_from_keyboard  +  " is "
                     +  (int) character_from_keyboard ) ;

      System.out.print( "\n Enter another character and press Enter: " ) ;

      character_from_keyboard = keyboard.nextLine().charAt( 0 ) ;

      System.out.print( "\n The code of the character "
                     +  character_from_keyboard  +  " is "
                     +  (int) character_from_keyboard ) ;
       System.out.print( "\n Enter a hexadecimal number: " ) ;

       int integer_from_keyboard  =  keyboard.nextInt( 16 ) ;

       System.out.print( "\n You entered: "  +  integer_from_keyboard
                       +  "\n" ) ;

   }

   public static void main( String[] not_in_use )
   {
      Scanner  keyboard  =  new Scanner( System.in ) ;

      //  tests related to arrays in Java

      int[]  days_in_months  = 
         { 0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 } ;

      for ( int month_index  =  0 ;
                month_index  <  days_in_months.length ;
                month_index  ++ )
      {
         System.out.print( " " + days_in_months[ month_index ] ) ;
      }

      double[]  us_gallons_to_liters  =  new  double[]
           { 0.0, 3.785, 7.570, 11.355, 15.140, 18.925 } ;

      double[]  us_gallons_to_liters_  =  
           { 0.0, 3.785, 7.570, 11.355, 15.140, 18.925 } ;


      float[] liters_to_us_gallons  =
                { 0.0F, 0.264F, 0.528F, 0.793F, 1.057F, 1.321F } ;
      char[]  arithmetic_operators  =  { '+', '-', '*', '/', '%' };
      
      int[] array_of_zeroes  =  new  int[ 6 ] ;
      int[] array_of_zeroes_  =  { 0, 0, 0, 0, 0, 0 } ;


      for ( int integer_index  =  0 ;
                integer_index  <  array_of_zeroes.length ;
                integer_index  ++ )
      {
         System.out.print( " " + array_of_zeroes[ integer_index ] ) ;
      }

      int[][]  matrix  =  new int[ 4 ] [ 5 ] ;

      matrix[ 0 ][ 0 ]  =  1 ;
      matrix[ 0 ][ 4 ]  =  1 ;
      matrix[ 3 ][ 0 ]  =  1 ;
      matrix[ 3 ][ 4 ]  =  1 ;


      int[][][]  cube  =  new int[ 3 ] [ 4 ] [ 5 ] ;

      cube[ 0 ] [ 0 ] [ 0 ]  =  1 ;

      cube[ 2 ] [ 3 ] [ 4 ]  =  1 ;
      

   }




   public static void main( String[] not_in_use )
   {
      Scanner  keyboard  =  new Scanner( System.in ) ;

      String  short_text_lines  =  "\n aaa \n bbb \n ccc " ;
      System.out.print( short_text_lines.length() ) ;

      int[] array_of_integers  =  new  int[ 50 ] ;
      array_of_integers[ 52 ]  =   88 ;
      array_of_integers[ 99 ]  =  888 ;   }




      // int enum  =  4 ;  // enum was reported to be a keyword
      int true  =  3 ;
      int false  =  4 ;


      true and false were not reported to be keywords.
      The following messages were printed when the above
      declarations were compiled.

Javatests.java:18: not a statement
      int true  =  3 ;
      ^
Javatests.java:18: ';' expected
      int true  =  3 ;
          ^
Javatests.java:19: not a statement
      int false  =  4 ;
      ^
Javatests.java:19: ';' expected
      int false  =  4 ;
          ^   


*****/