单项选择题
public class Score implements Comparable
private int wins, losses;
public Score(int w, int 1) { wins = w; losses = 1; }
public int getWins() { return wins; }
public int getLosses() { return losses; }
public String toString() {
return “<“ + wins + “,“ + losses + “>”;
}
// insert code here
}
Which method will complete this class?()
A. public int compareTo(Object o) {/*mode code here*/}
B. public int compareTo(Score other) {/*more code here*/}
C. public int compare(Score s1,Score s2){/*more code here*/}
D. public int compare(Object o1,Object o2){/*more code here*/}
相关考题
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单项选择题
1. import java.util.*; 2. public class TestSet { 3. enum Example { ONE, TWO, THREE } 4. public static void main(String[] args) { 5. Collection coll = new ArrayList(); 6. coll.add(Example.THREE); 7. coll.add(Example.THREE); 8. coll.add(Example.THREE); 9. coll.add(Example.TWO); 10. coll.add(Example.TWO); 11. coll.add(Example.ONE); 12. Set set = new HashSet(coll); 13. } 14. } Which statement is true about the set variable on line 12?()
A. The set variable contains all six elements from the coll collection, and the order is guaranteed to be preserved.
B. The set variable contains only three elements from the coll collection, and the order is guaranteed to be preserved.
C. The set variable contains all six elements from the coil collection, but the order is NOT guaranteed to be preserved.
D. The set variable contains only three elements from the coil collection, but the order is NOT guaranteed to be preserved. -
单项选择题
import java.util.*; public class WrappedString { private String s; public WrappedString(String s) { this.s = s; } public static void main(String[] args) { HashSet hs = new HashSet(); WrappedString ws1 = new WrappedString(”aardvark”); WrappedString ws2 = new WrappedString(”aardvark”); String s1 = new String(”aardvark”); String s2 = new String(”aardvark”); hs.add(ws1); hs.add(ws2); hs.add(s1); hs.add(s2); System.out.println(hs.size()); } } What is the result?()
A. 0
B. 1
C. 2
D. 3
E. 4
F. Compilation fails.
G. An exception is thrown at runtime. -
单项选择题
import java.util.*; public class PQ { public static void main(String[] args) { PriorityQueue pq = new PriorityQueue(); pq.add(”carrot”); pq.add(”apple”); pq.add(”banana”); System.out.println(pq.poll() +”:” + pq.peek()); } } What is the result?()
A. apple:apple
B. carrot:apple
C. apple:banana
D. banana:apple
E. carrot:carrot
F. carrot:banana
