每日-2.参考答案day07测试题

一、部 下面代码运行的结果理解不正确的是()ArrayList<String>ArrayList<String>al=newArrayList<String>();AA、编译失败B[s,ddd,true]C、[true]D3看程序选出正确的答案 B、将集合添加泛型>publicclassDemo01publicstaticvoidmain(String[]args){ArrayListal=newArrayList<>();for(inti=0;i<al.size();i++){Strings=al.get(i);}}}4.关于泛型的说法正确的是 AAJDK1.5成员属性snum学号)：int类型score(成绩):doubleprivate3Stu3个对象的属性分别赋值为：100161.0、1002,59.9、1003,29.8)ArrayList3Stu遍历集合,删除集合中元素的学号为1002控制台输出结果如下100161.0100329.8分publicstaticvoidmain(String[]args)//3个学生对象并赋值Stus1newStu(1001,61.0);Stus2newStu(1002,59.9);Stus3new 学生对象的集ArrayList<Stu>list=newfor(inti=0;i<list.size();i++){Stustulist.get(i);//}} 删除后的遍历打印集合内的学生对象for(inti=0;i<list.size();i++){Stustu=list.get(i);}}}publicclassStu{privateintsnum;privatedoublescore;publicintgetSnum(){returnsnum;}publicvoidsetSnum(intsnum){this.snum=snum;}publicdoublegetScore(){returnscore;}publicvoidsetScore(doublescore){this.score=score;}publicStu(intsnum,doublescore){this.snum=snum;this.score=score;}publicStu()}}}Soldier"王小兵,25,"李团长,35,ArrayListSoliderSolider40中这个对象 改成” show方法展示这个对象所有的属性信息publicstaticvoidmain(String[]args)Soldiers1newSoldier("王小兵",25,"打篮球");Soldiers2=newSoldier("李团长",35,"游泳");Soldiers3newSoldier("ArrayList<Soldier>list=new//for(inti=0;i<list.size();i++)Soldiers= 是否大于40//将大于40的对 修改为 }}}}publicclassSoldier{privateStringname;privateintage;privateStringlike;publicStringgetName(){returnname;}publicvoidsetName(Stringname){=name;}publicintgetAge(){returnage;}publicvoidsetAge(intage)this.agethis.age=}publicStringgetLike(){returnlike;}publicvoidsetLike(Stringlike){this.like=like;}publicSoldier(Stringname,intage,Strin