package?clad;

import?java.io.File;
import?java.io.FileNotFoundException;
import?java.io.IOException;
import?java.lang.reflect.Constructor;
import?java.lang.reflect.Field;
import?java.lang.reflect.InvocationTargetException;
import?java.lang.reflect.Method;

/**
?*??BrowserLauncher?is?a?class?that?provides?one?static?method?openURL?which?opens?the?default?web?browser?for?the
?*??current?user?of?the?system?to?the?given?URL.?It?may?support?other?protocols?depending?on?the?system?--?mailto?ftp
?*??etc.?--?but?that?has?not?been?rigorously?tested?and?is?not?guaranteed?to?work.?

?*
?*??Yes?this?is?platform-specific?code?and?yes?it?may?rely?on?classes?on?certain?platforms?that?are?not?part?of?the
?*??standard?JDK.?What?we‘re?trying?to?do?though?is?to?take?something?that‘s?frequently?desirable?but?inherently
?*??platform-specific?--?opening?a?default?browser?--?and?allow?programmers?（you?for?example）?to?do?so?without?worrying
?*??about?dropping?into?native?code?or?doing?anything?else?similarly?evil.?

?*
?*??Anyway?this?code?is?completely?in?Java?and?will?run?on?all?JDK?1.1-compliant?systems?without?modification?or?a?need
?*??for?additional?libraries.?All?classes?that?are?required?on?certain?platforms?to?allow?this?to?run?are?dynamically
?*??loaded?at?runtime?via?reflection?and?if?not?found?will?not?cause?this?to?do?anything?other?than?returning?an?error
?*??when?opening?the?browser.?

?*
?*??There?are?certain?system?requirements?for?this?class?as?it‘s?running?through?Runtime.exec（）?which?is?Java‘s?way?of
?*??making?a?native?system?call.?Currently?this?requires?that?a?Macintosh?have?a?Finder?which?supports?the?GURL?event
?*??which?is?true?for?Mac?OS?8.0?and?8.1?systems?that?have?the?Internet?scripting?Applescript?dictionary?installed?in
?*??the?scripting?Additions?folder?in?the?Extensions?folder?（which?is?installed?by?default?as?far?as?I?know?under?Mac?OS
?*??8.0?and?8.1）?and?for?all?Mac?OS?8.5?and?later?systems.?On?Windows?it?only?runs?under?Win32?systems?（Windows?95
?*??98?and?NT?4.0?as?well?as?later?versions?of?all）.?On?other?systems?this?drops?back?from?the?inherently
?*??platform-sensitive?concept?of?a?default?browser?and?simply?attempts?to?launch?Netscape?via?a?shell?command.?

?*
?*??This?code?is?Copyright?1999-2001?by?Eric?Albert?（ejalbert@cs.stanford.edu）?and?may?be?redistributed?or?modified?in
?*??any?form?without?restrictions?as?long?as?the?portion?of?this?comment?from?this?paragraph?through?the?end?of?the
?*??comment?is?not?removed.?The?author?requests?that?he?be?notified?of?any?application?applet?or?other?binary?that
?*??makes?use?of?this?code?but?that‘s?more?out?of?curiosity?than?anything?and?is?not?required.?This?software?includes
?*??no?warranty.?The?author?is?not?repsonsible?for?any?loss?of?data?or?functionality?or?any?adverse?or?unexpected
?*??effects?of?using?this?software.?

?*
?*??Credits:?

?*??Steven?Spencer?JavaWorld?magazine?（