单项选择题
A programmer has an algorithm that requires a java.util.List that provides an efficient implementation of add(0, object), but does NOT need to support quick random access.
What supports these requirements?()
A.java.util.Queue
B.java.util.ArrayList
C.java.util.LinearList
D.java.util.LinkedList
相关考题
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多项选择题
Given: Which two code fragments, inserted independently at line 5, will compile without warnings?()
A.public void addStrings(List list) {
B.public void addStrings(List<String> list) {
C.public void addStrings(List<? super String> list) {
D.public void addStrings(List<? extends String> list) { B,C -
多项选择题
Given: A programmer is developing a class Key, that will be used as a key in a standard java.util.HashMap. Which two methods should be overridden to assure that Key works correctly as a key?()
A.public int hashCode()
B.public boolean equals(Key k)
C.public int compareTo(Object o)
D.public boolean equals(Object o)
E.public boolean compareTo(Key k) -
单项选择题
Given: What is the appropriate definition of the hashCode method in class Person?()
A.return super.hashCode();
B.return name.hashCode() + age * 7;
C.return name.hashCode() + comment.hashCode() / 2;
D.return name.hashCode() + comment.hashCode() / 2 - age * 3;
