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Editorial Team
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Asked: 2026-06-06T09:15:05+00:00

I found this Is Sun Java really necessary for using Android SDK on Ubuntu

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I found this Is Sun Java really necessary for using Android SDK on Ubuntu 10.10? I prefer OpenJDK but I can’t build android project on Ubuntu. When I try:

$ ant debug

I got:

Unable to locate tools.jar. Expected to find it in /usr/lib/jvm/java-6-openjdk/lib/tools.jar

...

BUILD FAILED
/home/kuba/projects/Android/android-sdk-linux/tools/ant/build.xml:651: The following error occurred while executing this line:
/home/kuba/projects/Android/android-sdk-linux/tools/ant/build.xml:672: Unable to find a javac compiler;
com.sun.tools.javac.Main is not on the classpath.
Perhaps JAVA_HOME does not point to the JDK.
It is currently set to "/usr/lib/jvm/java-6-openjdk/jre"

I have java version:

$ java -version
java version "1.6.0_20"
OpenJDK Runtime Environment (IcedTea6 1.9.13) (6b20-1.9.13-0ubuntu1~10.10.1)
OpenJDK Client VM (build 19.0-b09, mixed mode, sharing)
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1 Answer

  1. Editorial Team

    Make sure you have the openjdk JDK installed. By default you probably only have the JRE installed. If you open Synaptic, search for openjdk and then you’ll see both the JDK and the JRE. Select the JDK package and install. I think the actual packagename is openjdk-6-jdk.

    or use the commandline

    # sudo apt-get install openjdk-6-jdk
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