UsingµJavatoTestClassesThemuJavasystemrequiresthattheJavaCLASSPATHbemodifiedtoincludethemuJavajarandtheJavatools.jarfiles.Also,thegeneralPATHvariablemustincludethejavabindirectory;thisisusuallysetautomaticallywhenjavawasinstalled,butnotalways.ThenoneGUI(Javaapplet)isusedtogeneratemutants,thetestermustcreatetests,andanotherGUIisusedtorunmutants.1.EnvironmentSettingsforthemuJavaSystemTherearethreestepstosettinguptheenvironmentformuJava,(1)CLASSPATH,(2)settingtheconfigfile,and(3)creatingsubdirectories.TheJavaCLASSPATHmustincludetwoµJavajarfilesandonestandardJavajarfile.tools.jarisstandardwithJavacompilersandisprobablylocatedinthe"lib/"directory.ThetwoµJavafilesaremujava.jarandopenjava2005.jar,whicharedownloadedfromthissite.OneslightlyawkwardrequirementisthattheCLASSPATHmustincludethelocationoftheclassesundertestwhengeneratingmutants,butNOTwhenrunningmutants.(Ifitdoes,nomutantscanbekilled.)Thislocationisthe"classes/"directoryunderwherethemujava.configisstored.InaDOSwindow,usethefollowingcommand(assumingthatclassesisunderC:\mujava):setCLASSPATH=%CLASSPATH%;C:\mujava\mujava.jar;C:\mujava\openjava2005.jar;C:\j2sdk1.4.0_01\lib\tools.jar;C:\mujava\classesInaCygwinwindow,usethefollowingcommand:CLASSPATH="$CLASSPATH;C:\mujava\mujava.jar;C:\mujava\openjava2005.jar;C:\j2sdk1.4.0_01\lib\tools.jar;C:\mujava\classes";exportCLASSPATHTochangeyourCLASSPATHpermanentlyinWin2000andWinXP,gotoStart-settings-ControlPanel.Double-clickSystem,gototheAdvancedtab,andchooseEnvironmentVariables.EdittheCLASSPATHvariableorcreateanewvariableifthereisnone.Addthefullpathtomujava.jarandopenjava2005.jartotheCLASSPATH.InUnix,settheCLASSPATHenvironmentvariable.Assumingthejarfilesarestoredinthehomedirectoryofusergpd:CLASSPATH=$CLASSPATH:/home/gpd/mujava.jar:/home/gpd/openjava2005.jar:/java1.4/j2sdk1.4.0_01/lib/tools.jar;exportCLASSPATHNotethatthesyntaxwillvaryunderdifferentshells,anditwillbemoreconvenienttoputthecommandinyoursetupfilesuchas.login,or.bashrc.Next,modifythemujava.configfiletopointto