摘要： 装JDK最好把原来的OpenJDK删除。The link has instructions for installing Oracle JDK, the Java 7 browser plugin and how to revert the changes.So here is a tested (under Ubuntu 11.04 and 11.10) and working solution for installing Oracle JDK 7 and all its files so "javac" and everything else works:How To 阅读全文