tools.jar seems to be not in Android Studio classpath on Windows 8

Question

I installed Android Studio but it was giving me error that I need to install JDK but JDK was already installed. Then I realized it is asking to install 64bit version of JDK.

Answer 1

Known issue - my solution was to install JDK 7u80 - worked after that.

https://code.google.com/p/android/issues/detail?id=187048

Answer 2

I had the same issue on windows 7 when I installed Android Studio. I had Jdk 8 on my system. So for me, copying the tools.jar from jdk\lib to androidstudio\lib worked. I found the tools.jar was missing from androidstudio's lib directory. I had set JAVA_HOME in user variable and JDK in system variable.

Answer 3

First locate in your PC the route of your JDK (for instance: C:\Program Files\Java\jdk1.7.0_45)

then change the JAVA_HOME variable as follows:

1. Right-click the My Computer icon on your desktop and select Properties
2. Click the Advanced tab
3. Click the Environment Variables button
4. Under System Variables, click New
5. Enter the variable name as JAVA_HOME
6. Enter the variable value as the installation path for the Java Development Kit

Answer 4

I installed jdk 1.8.0_51 64bit on Windows7. After that, no JAVA_HOME was defined, so I had to define it myself as described above, but it did not work unless I added a trailing backslash: D:\Programs\Java\jdk1.8.0_51\.

Without the backslash at the end it did not work.

Answer 5

Just Copy the tools.jar from your jdk to Android lib directory.

Answer 6

After I set JAVA_HOME variable and restart my windows pc I resolved my issue.

JAVA_HOME value should like below.

C:\Program Files\Java\jdk1.8.0_25\bin

I paste a screenshot for someone's help.

You can go here From My Computer / This PC > Property > Advance Variable.