题目内容

下列ABCD注释标注的哪行代码有错误？import java.util.*;public class E {public static void main(String args[]) {List linkedList = new LinkedList(); //AList arryList = new ArrayList(); //BList stack = new Stack(); //CList set = new TreeSet(); //D}}

A
B
C
D

查看答案

搜索结果不匹配？点我反馈

更多问题

下列ABCD注释标注的哪行代码有错误？import java.util.*;public class E {public static void main(String args[]) {LinkedList linkedList = new LinkedList(); //AArrayList arryList = new ArrayList(); //BlinkedList.add(1);linkedList.add(2);arryList.add(1);int m = linkedList.removeLast(); //Cint n = arryList.removeLast(); //D}}

A
B
C
D

查看答案

下列ABCD注释标注的哪行代码有错误？import java.util.*;public class E {public static void main(String args[]) {Map map = new HashMap(); //ASet treeSet = new TreeSet(); //BMap treeMap = new TreeMap(); //CList list = new LinkedList(); //D}}

A
B
C
D

查看答案

import java.util.*;public class E {public static void main(String args[]) {Map map = new HashMap();map.put(1,"hello"); //Amap.put('a',"hello"); //BMap mapTwo = new HashMap();mapTwo.put(1.2F,"hello"); //CmapTwo.put(1F,"hello"); //D}}

A
B
C
D

查看答案

下列哪些叙述是正确的？（多选）

ArrayList的public void add(int index,E element)方法的执行效率低于LinkedList的效率。
B. ArrayList的public void add(int index,E element)方法的执行效率高于LinkedList的效率。
C. ArrayList的public E get(int index)方法的执行效率低于LinkedList的效率。
D. ArrayList的public E get(int index)方法的执行效率效率高于LinkedList的效率。

查看答案

下列ABCD注释标注的哪行代码有错误？import java.util.*;public class E {public static void main(String args[]) {List linkedList = new LinkedList(); //AList arryList = new ArrayList(); //BList stack = new Stack(); //CList set = new TreeSet(); //D}}

A B C D

下列ABCD注释标注的哪行代码有错误？import java.util.*;public class E {public static void main(String args[]) {Map map = new HashMap(); //ASet treeSet = new TreeSet(); //BMap treeMap = new TreeMap(); //CList list = new LinkedList(); //D}}

import java.util.*;public class E {public static void main(String args[]) {Map map = new HashMap();map.put(1,"hello"); //Amap.put('a',"hello"); //BMap mapTwo = new HashMap();mapTwo.put(1.2F,"hello"); //CmapTwo.put(1F,"hello"); //D}}

下列哪些叙述是正确的？（多选）

A
B
C
D