Oracle
1Z0-819 · Question #70
1Z0-819 Question #70: Real Exam Question with Answer & Explanation
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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?
Options
- AInsert Comparator<Person> on line 1. Insert public int compare(Person p1, Person p2) { return p1.name.compare(p2.name); } on line 2.
- BInsert Comparator<Person> on line 1. Insert public int compareTo(Person person) { return person.name.compare(this.name); } on line 2.
- CInsert Comparable<Person> on line 1. Insert public int compare(Person p1, Person p2) { return p1.name.compare(p2.name); } on line 2.
- DInsert Comparator<Person> on line 1. Insert public int compare(Person person) { return person.name.compare(this.name); } on line 2.
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