How do I install a JRE or JDK to run the Android Developer Tools on Windows 7?

You can go here to download the Java JRE.

You can go here to download the Java JDK.

After that you need to set up your environmental variables in Windows:

EDIT: See screenshot for environmental variables

enter image description here

download jre1.7.0_45 and then extract it into the Eclipse folder and rename folder of jre1.7.0_45 to jre and Eclipse will run

java android android-emulator

you need to download and install jdk from here

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