How to download Java JDK tool

First of all 

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              Go to download page

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Click here

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Java SE Development 8u131 (at present this version is available at 192.84MB)

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Please download the full Development kit 

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Don't download the demos and sample package(less then 100MB)

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Download windows x64

   "Jdk-8u131-windows-x64.exe

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After downloading the package

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Now open it as administrator 

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It will complete the set up itself......!!!!