每日-2.參考答案day07測(cè)試題

一、部 下面代碼運(yùn)行的結(jié)果理解不正確的是()ArrayList<String>ArrayList<String>al=newArrayList<String>();AA、編譯失敗B[s,ddd,true]C、[true]D3看程序選出正確的答案 B、將集合添加泛型>publicclassDemo01publicstaticvoidmain(String[]args){ArrayListal=newArrayList<>();for(inti=0;i<al.size();i++){Strings=al.get(i);}}}4.關(guān)于泛型的說(shuō)法正確的是 AAJDK1.5成員屬性snum學(xué)號(hào))：int類(lèi)型score(成績(jī)):doubleprivate3Stu3個(gè)對(duì)象的屬性分別賦值為：100161.0、1002,59.9、1003,29.8)ArrayList3Stu遍歷集合,刪除集合中元素的學(xué)號(hào)為1002控制臺(tái)輸出結(jié)果如下100161.0100329.8分publicstaticvoidmain(String[]args)//3個(gè)學(xué)生對(duì)象并賦值Stus1newStu(1001,61.0);Stus2newStu(1002,59.9);Stus3new 學(xué)生對(duì)象的集ArrayList<Stu>list=newfor(inti=0;i<list.size();i++){Stustulist.get(i);//}} 刪除后的遍歷打印集合內(nèi)的學(xué)生對(duì)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,"李團(tuán)長(zhǎng),35,ArrayListSoliderSolider40中這個(gè)對(duì)象 改成” show方法展示這個(gè)對(duì)象所有的屬性信息publicstaticvoidmain(String[]args)Soldiers1newSoldier("王小兵",25,"打籃球");Soldiers2=newSoldier("李團(tuán)長(zhǎng)",35,"游泳");Soldiers3newSoldier("ArrayList<Soldier>list=new//for(inti=0;i<list.size();i++)Soldiers= 是否大于40//將大于40的對(duì) 修改為 }}}}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