多项选择题
Given a class whose instances， when found in a collection of objects， are sorted by using the compare To method， which two statements are true？（）
A.The class implements java.lang.Comparable.
B.The class implements java.util.Comparator.
C.The interface used to implement sorting allows this class to define only one sort sequence.
D.The interface used to implement sorting allows this class to define many different sort sequences.
相关考题
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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 -
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）
