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loading a method from a class in a package
this example from a Well House Consultants training course
Source code: Niamh.java Module: J050
// If you want to look in current package and also in disney // for any extra classes: // import disney.*; // Otherwise you have to specify the full package name /* You won't have all yor code in your current class file - or even in the current directory. You can load other classes from other 'packages' (directories) by giving the package name. Within the package, care must be taken to ensure that all methods are marked public, protected or private as necessary (or are not marked at all if you want them to be visible within their own directory / package but not outside) */ public class Niamh { public static void main (String [] args) { int totarea = disney.Orlando.getarea(30,40); System.out.println("Area is "+totarea); for (int h=2; h<24; h+=2) { disney.Hour foodtime = new disney.Hour(h); System.out.println ("It is " + foodtime.gethour() + " which is "+ foodtime.get12hc() + " in the "+foodtime.getampm()); } } } /* ------------ Sample output Dorothy-2:java grahamellis$ java Niamh Area is 1200 It is 2 which is 2 in the am It is 4 which is 4 in the am It is 6 which is 6 in the am It is 8 which is 8 in the am It is 10 which is 10 in the am It is 12 which is 0 in the pm It is 14 which is 2 in the pm It is 16 which is 4 in the pm It is 18 which is 6 in the pm It is 20 which is 8 in the pm It is 22 which is 10 in the pm Dorothy-2:java grahamellis$ ********** If you get error messages like this one, it means that ********** you have not compiled the call you have called in to be ********** within the package. i.e. (in this specific example) ********** you have probably missed off "package disney" within it Niamh.java:5: cannot access disney.Orlando bad class file: ./disney/Orlando.class class file contains wrong class: Orlando Please remove or make sure it appears in the correct subdirectory of the classpath. int totarea = disney.Orlando.getarea(30,40); ^ 1 error Dorothy-2:java grahamellis$ ********** END OF ERROR SAMPLE */ Learn about this subject
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