Error: Unable to locate tools.jar

Our solution is to install the Java JDK and JRE pacakges. install-java-openjdk-6-jdk-and-jre

To install the Java JDK and JRE

On Ubuntu, the default Java JDK is called openjdk-6-jdk

To install OpenJDK on Ubuntu, there are three major packages:

  apt-get install openjdk-6-jdk
  apt-get install openjdk-6-jre-headless
  apt-get install openjdk-6-jre-lib

To find tools.jar

  find -type f -name tools.jar

  /usr/lib/jvm/java-6-openjdk/jre/lib/

What causes "Unable to locate tools.jar"?

This error can happen when you install a package such as ant which depends on the Java JRE, but not the Java JDK.

Some developers believe that the ant package should also require the Java JDK, which would solve this error.

When you try to build something using ant, the build fails because your system is missing openjdk-6-jdk.

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