How do i configure eclipse to make use of different version of JDK

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You need:

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The default JRE is shown with a check mark and is used by new eclipse projects unless the project specifically overrides the value.
So the next step is to check which JRE the current project is using.

  • Right click the project and choose “properties”.
  • Select “Java Build Path” and then click the tab labeled “Libraries”. You should see an entry like “JRE System Library [version]”.
    To change the JRE version,

    • highlight the entry and click “Remove”.
    • Then click “Add Library…”. Choose “JRE System Library”.
      If you choose “Workspace Default”, the project will use the JRe defined under “Windows -> Properties” as explained above.
      You may also specify an alternate JRE located somewhere on your file system, or choose an embedded execution environment provided by Eclipse.

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