文档介绍：,jre,,,.==,,StringBuffer,、Map、Set三个接口,存取元素是,()还是start()()和wait(),RuntimeException,++{/*父类构造方法*/publicA(){("Aconstructor");}/*父类静态块*/static{("AstaticBlock");}/*父类非静态块*/{("Anon-staticBlock");}/*父类静态方法*/publicstaticvoidprintStaticMethod(){("AprintStaticMethod");}/*父类普通方法*/publicvoidprintNormalMethod(){("AprintNormalMethod");}}classBextendsA{/*子类1构造方法*/publicB(){("Bconstructor");}/*子类1静态块*/static{("BstaticBlock");}/*子类1非静态块*/{("Bnon-staticBlock");}/*子类1静态方法*/publicstaticvoidprintStaticMethod(){("BprintStaticMethod");}/*子类1普通方法*/publicvoidprintNormalMethod(){("BprintNormalMethod");}}classCextendsA{/*子类2构造方法*/(){("Cc