$ dep -L jdk
virtual/jdk:
!!! Unknown USE component: env.d
        dev-java/ant-core-1.7.0              >=virtual/jdk-1.4
!!! Unknown USE component: env.d
        dev-java/ant-junit-1.7.0             >=virtual/jdk-1.4
!!! Unknown USE component: env.d
        dev-java/antlr-2.7.7                 >=virtual/jdk-1.3
!!! Unknown USE component: env.d
        dev-java/ant-trax-1.7.0              >=virtual/jdk-1.4
!!! Unknown USE component: env.d
        dev-java/bcel-5.2                    >=virtual/jdk-1.4
!!! Unknown USE component: env.d
        dev-java/commons-beanutils-1.6.1-r3  >=virtual/jdk-1.3
!!! Unknown USE component: env.d
        dev-java/commons-beanutils-1.7.0-r2  >=virtual/jdk-1.3
!!! Unknown USE component: env.d
        dev-java/commons-collections-3.2-r1  >=virtual/jdk-1.4
!!! Unknown USE component: env.d
        dev-java/commons-daemon-1.0.1-r2     >=virtual/jdk-1.4
!!! Unknown USE component: env.d
        dev-java/commons-dbcp-1.2.2          || =virtual/jdk-1.5*
!!! Unknown USE component: env.d
        dev-java/commons-digester-1.7-r2     >=virtual/jdk-1.4
!!! Unknown USE component: env.d
        dev-java/commons-el-1.0-r1           >=virtual/jdk-1.4
!!! Unknown USE component: env.d
        dev-java/commons-fileupload-1.2      >=virtual/jdk-1.4
!!! Unknown USE component: env.d
        dev-java/commons-httpclient-2.0.2-r1  >=virtual/jdk-1.3
!!! Unknown USE component: env.d
        dev-java/commons-io-1.3.2            >=virtual/jdk-1.4
!!! Unknown USE component: env.d
        dev-java/commons-launcher-1.1-r1     >=virtual/jdk-1.4
!!! Unknown USE component: env.d
        dev-java/commons-logging-1.1-r2      >=virtual/jdk-1.3
!!! Unknown USE component: env.d
        dev-java/commons-modeler-2.0         >=virtual/jdk-1.4
!!! Unknown USE component: env.d
        dev-java/commons-pool-1.3            >=virtual/jdk-1.4
!!! Unknown USE component: env.d
        dev-java/commons-validator-1.1.4-r1  >=virtual/jdk-1.4
!!! Unknown USE component: env.d
        dev-java/eclipse-ecj-3.3.0-r1        >=virtual/jdk-1.4
!!! Unknown USE component: env.d
        dev-java/jakarta-oro-2.0.8-r2        >=virtual/jdk-1.3
!!! Unknown USE component: env.d
        dev-java/jakarta-regexp-1.3-r4       >=virtual/jdk-1.4
!!! Unknown USE component: env.d
        dev-java/javacup-0.10k-r1            >=virtual/jdk-1.3
!!! Unknown USE component: env.d
        dev-java/junit-3.8.1-r3              >=virtual/jdk-1.3
!!! Unknown USE component: env.d
        dev-java/log4j-1.2.14-r1             >=virtual/jdk-1.4
!!! Unknown USE component: env.d
        dev-java/mx4j-core-3.0.1             >=virtual/jdk-1.4
!!! Unknown USE component: env.d
        dev-java/portletapi-1.0              >=virtual/jdk-1.4
!!! Unknown USE component: env.d
        dev-java/saxpath-1.0-r2              >=virtual/jdk-1.4
!!! Unknown USE component: env.d
        dev-java/servletapi-2.3-r3           >=virtual/jdk-1.4
!!! Unknown USE component: env.d
        dev-java/servletapi-2.4-r5           >=virtual/jdk-1.4
!!! Unknown USE component: env.d
        dev-java/struts-1.2.9-r1             >=virtual/jdk-1.4
!!! Unknown USE component: env.d
        dev-java/sun-jaf-1.1                 >=virtual/jdk-1.4
!!! Unknown USE component: env.d
        dev-java/sun-javamail-1.4            >=virtual/jdk-1.5
!!! Unknown USE component: env.d
!!! Unknown USE component: env.d
!!! Unknown USE component: env.d
        dev-java/tomcat-servlet-api-5.5.25   !java5? =virtual/jdk-1.4*
        dev-java/xalan-2.7.0-r3              >=virtual/jdk-1.4
!!! Unknown USE component: env.d
        dev-java/xerces-2.8.1                >=virtual/jdk-1.4
!!! Unknown USE component: env.d
        dev-java/xjavac-20041208-r5          >=virtual/jdk-1.4
!!! Unknown USE component: env.d
        dev-java/xml-commons-external-1.3.04  >=virtual/jdk-1.3
!!! Unknown USE component: env.d
        dev-java/xml-commons-resolver-1.2    >=virtual/jdk-1.3
!!! Unknown USE component: env.d
!!! Unknown USE component: env.d
        virtual/jre-1.4.2                    || =virtual/jdk-1.4.2*
!!! Unknown USE component: env.d
        virtual/jre-1.5.0                    || =virtual/jdk-1.5.0*
!!! Unknown USE component: env.d
!!! Unknown USE component: env.d
        www-servers/tomcat-5.5.25-r1         !java5? =virtual/jdk-1.4*