Download Java SDK 7.1 from WebSphere Application Server V8.5.5 Fix Pack 2 . Then unzip both the 7.1.0.0-WS-IBMWASJAVA-part1.zip and 7.1.0.0-WS-IBMWASJAVA-part2.zip into a folder and use Installation Manager to install the new SDK. The instructions below are installation instructions .
Then use the managesdk command to find out the sdk id and switch Java for your profile.
For example (this is from 7.0, but you get an idea of how to find it for 7.1):
C:\IBM\WebSphere\AppServer85\profiles\AppSrv1\bin>managesdk.bat -listAvailable CWSDK1003I: Available SDKs : CWSDK1005I: SDK name: 1.6_32 CWSDK1005I: SDK name: 1.7_32 CWSDK1001I: Successfully performed the requested managesdk task.
Then, if you want to change it for one profile, you call:
managesdk -enableProfile -profileName AppSrv01 -sdkname SDK_Name -enableServers
or for all profiles:
managesdk -enableProfileAll -sdkname SDK_Name -enableServers
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