public class Tester {
public static class Person implements /* line 1 */ {
private String name;
Person(String name) { this.name = name; }
/* line 2 */
}
public static void main(String[] args) {
Person[] people = new Person("Mary"),
new Person("Jane");
new Person("John");
Arrays.sort(people);
for (Person person: people)
System.out.println(person.name);
}
}
You want the code to produce this output:
Jane
John
Mary
Which code fragment should be inserted on line 1 and line 2 to produce the output?

Question

public class Tester {
 public static class Person implements /* line 1 */ {
 private String name;
 Person(String name) { this.name = name; }
 /* line 2 */
 }
 public static void main(String[] args) {
 Person[] people = new Person("Mary"),
 new Person("Jane");
 new Person("John");
 Arrays.sort(people);
 for (Person person: people)
 System.out.println(person.name);
 }
}
You want the code to produce this output:
Jane
John
Mary
Which code fragment should be inserted on line 1 and line 2 to produce the output?

Accepted Answer

B. Insert Comparator<Person> on line 1.
 Insert
 public int compareTo(Person person) {
 return person.name.compare(this.name);
 }
 on line 2.

Answer

A. Insert Comparator<Person> on line 1.
 Insert
 public int compare(Person p1, Person p2) {
 return p1.name.compare(p2.name);
 }
 on line 2.

Answer

C. Insert Comparable<Person> on line 1.
 Insert
 public int compare(Person p1, Person p2) {
 return p1.name.compare(p2.name);
 }
 on line 2.

Answer

D. Insert Comparator<Person> on line 1.
 Insert
 public int compare(Person person) {
 return person.name.compare(this.name);
 }
 on line 2.

public class Tester { public static class Person implements / line 1 / { private String name; Person(String name) { this.name = name; } / line 2 / } public static void main(String[] args) { Person[]…

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