title: build error while building android source code
body: <p>I am building android source code on ubuntu 10.04.While Building source code I got following build error.</p>
  
  <blockquote>
    <p>javadoc: error - In doclet class com.google.doclava.Doclava,  method
    start has thrown an exception
    java.lang.reflect.InvocationTargetException
    java.lang.NoSuchMethodError: java.lang.String.isEmpty()Z</p>
  </blockquote>
  
  <p>I am using /usr/lib/jvm/java-6-sun</p>