code: public void setCompileVersion(String version) {
          if (StringUtils.isNotEmpty(version)
                  && !version.equals(ClassUtils.getJavaVersion())) {
              options.add("-target");
              options.add(version);
              lintOptions.add("-target");
              lintOptions.add(version);
          }
      }
docs: httl.properties: java.specification.version=1.7