https://docs.oracle.com/javase/7/docs/api/java/util/concu...[作者空间]
https://docs.oracle.com/javase/7/docs/api/java/lang/Objec...[作者空间]
https://docs.oracle.com/javase/7/docs/api/java/util/concu...[作者空间]
https://docs.oracle.com/javase/7/docs/api/java/util/concu...[作者空间]
https://docs.oracle.com/javase/7/docs/api/java/util/concu...[作者空间]
