Java.lang.classcastexception (Java强制类型转换异常) ) ) ) ) ) ) )。
package java20211021.exeception; publicabstractclassanimal { abstractvoideat (; } classcatextendsanimal { @ overridevoideat () { System.out.println (猫吃鱼) ); } public void catMouse (() { System.out.println ) )“猫抓老鼠”; } classdogextendsanimal { @ overridevoideat () { System.out.println (狗吃骨头) ); } public void watchHouse () ({ System.out.println ) )“看家”; } classtestanimal { publicstaticvoidmain (string [ ] args ) { Animal a=new Cat ); a.eat (; catc=(cat ) a; c.catMouse (; dogd=(dog ) a; d.watchHouse (; }
解决方法:直接转换为该类型即可