Java 설치시 다음과 같은 오류가 난다면..Cannot load 64-bit SWT libraries on 32-bit JVM

모든 일의 시작은.. 최근에 JRE를 업데이트를 했는데..

32-Bit로 update가 된 듯...

Eclipse 실행시

!ENTRY org.eclipse.osgi 4 0 2015-03-31 14:21:48.411 !MESSAGE Application error !STACK 1 java.lang.UnsatisfiedLinkError: Cannot load 64-bit SWT libraries on 32-bit JVM at org.eclipse.swt.internal.Library.loadLibrary(Library.java:256) at org.eclipse.swt.internal.Library.loadLibrary(Library.java:236) at org.eclipse.swt.internal.C.<clinit>(C.java:21) at org.eclipse.swt.widgets.Display.<clinit>(Display.java:138) at org.eclipse.ui.internal.Workbench.createDisplay(Workbench.java:716) at org.eclipse.ui.PlatformUI.createDisplay(PlatformUI.java:162) at org.eclipse.ui.internal.ide.application.IDEApplication.createDisplay(IDEApplication.java:165) at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:107) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:380) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:235) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:648) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:603) at org.eclipse.equinox.launcher.Main.run(Main.java:1465) at org.eclipse.equinox.launcher.Main.main(Main.java:1438)

찾아보니 64-Bit 버전인데 JRE가 32-Bit라 그런다고 해서..

기왕 하는거.. 1.8 64-bit를 깔았더니..

has value '1.8', but '1.7' is required.

와 같은 오류 발생..

또 구글링..

http://stackoverflow.com/questions/26324486/properly-installing-java-8-along-with-java-7

The problem is that Java 8 installs a lot of stuff that you don't really need:

• \windows\system32 contains Java 8 java.exe, javaw.exe and javaws.exe. Your path probably has system32 near the beginning, so these tend to be run by default.
• The system path variable starts with C:\programdata\Oracle\Java\javapath. This folder contains java.exe, javaw.exe and javaws.exe as symlinks to the JRE 8 executables.

I've deleted the system32 files and removed C:\programdata\Oracle\Java\javapath from the system path. This seems to cure the problem. I can now switch versions by pointing JAVA_HOME and PATH to the appropriate folders.

Oracle, it seems, are determined to make it hard to run multiple versions. This is understandable with the JRE, but it's crazy with JDKs, as developers almost always need multiple versions of Java.

즉...

 C:\programdata\Oracle\Java\javapath 지우고.. 

시스템 path 설정에서도 제거.. system32에 들어가보니 java.exe, javaw.exe 있는거도 삭제..

버전인식 1.8로 성공.. 끗! 뭘 봐!