vid http://java.sun.com/j2se/1.4.2/install-windows.html
Private vs. public J2RE - Installing the Java 2 SDK installs a private Java 2 Runtime Environment and optionally a public copy. The private J2RE is required to run the tools included with the Java 2 SDK. It has no registry settings and is contained entirely in a jre directory (typically at C:\Program Files\j2sdk1.4.2\jre) whose location is known only to the SDK. On the other hand, the public J2RE can be used by other Java applications, is contained outside the SDK (typically at C:\Program Files\Java\j2re1.4.2), is registered with the Windows registry (at HKEY_LOCAL_MACHINE\SOFTWARE\JavaSoft), can be removed using Add/Remove Programs, might or might not be registered with browsers, and might or might not have java.exe copied to the Windows system directory (making it the default system Java platform or not). Roman Oto Buchta said: > On Monday 23 of January 2006 14:34, Martin Kuba wrote: >> [EMAIL PROTECTED] wrote: >> > mam windows XP pro >> > a je mozne zacat instalaciu 1.3 ak uz je predtym 1.5 ? >> > co to urobi s browser plugin a pod ? >> > >> > a ako do buducnosti ? >> > je potrebne javu vobec instalovat pre kazdu verziu samostatne ? >> > nestaci si len postupne nainstalovat 1.2, 1.3, 1.4, 1.5, cele to potom >> > niekde odzalohovat. a napr pri inom pocitaci nainstalovat len 1.5 a >> > nizsie 1.2 - 1.4 len preniest z ineho pc ? s tym ze posledna bude 1.5 >> a >> > ak budem potrebovat kompilovat a testovat pod 1.3 len zmenim java_home >> ? >> >> Ja to na Windows delam tak, ze si stahnu JDK, pri instalaci >> si zvolim vlastni adresar, treba pro jdk1.5.0 to bude C:\jdk1.5.0 >> a NEnainstaluju JRE. Pak mam v C:\jdk1.5.0 vsechno co potrebuju >> a z prikazoveho radku (cygwin :-)) to pouzivam stejne jako v Unixech. >> >> Stejnym zpusobem pak mam vedle sebe >> >> C:\jdk1.5.0 >> C:\jdk1.4.2 >> C:\ibm1.4.2 >> >> a nijak si nezavazi. Dodnes jsem nepochopil, proc SUNi JDK >> pri instalaci instaluje jeste JRE nekam do C:\Program Files, >> takze na disku jsou pak *dve* instalace runtime systemu, >> jedna pro JRE a druha pro JDK. >> >> Akorad jsem zjistil, ze kdyz takhle vynecham instalaci JRE, >> tak mi nechodi java plugin v prohlizecich. > > To mi prijde jako klasicky priklad nezvladnuteho procesu konfigurace od > Sunu. > Ty dve JRE se lisi prave nejakymi vecmi pro Java plugin. Detailne jsem to > neresil (jenom jsem potreboval rozchodit Java Plugin ve skolni siti, na > Linuxech tento problem nemam), ale opravdu pro fungovani v IE potrebujes > JRE > a pro normalni praci JDK :-( > > V SuSE je pekny system na vyber JDKcka - nastavene priority, linky, > parametr > skriptu nastavujici cesty, umi i classpath pro ruzne nastroje,... aspon si > to > clovek nemusi psat sam. > -- > Oto 'tapik' Buchta, [EMAIL PROTECTED] > Senior Engineer, Systinet Corp, > http://www.systinet.com >
