我正在使用哪个JRE？

 System.out.println(System.getProperty("java.vendor")); System.out.println(System.getProperty("java.vendor.url")); System.out.println(System.getProperty("java.version")); Sun Microsystems Inc. http://java.sun.com/ 1.6.0_11

http://docs.oracle.com/javase/tutorial/essential/environment/sysprop.html