Multiple Choices
Answer (Choose 1 answer)
What is the output of the following program?
import java.util.*;
class Pen implements Comparable<Pen> {
String color; int price;
Pen(String color, int price) { this.color=color; this.price=price; }
public String toString() { return("("+color+","+price+") "); }
public int compareTo(Pen x) {
int k = color.compareTo(x.color);if(k!=0) return(-k);
return(x.price - price);
}
}
public class Main {
public static void main(String[] args) { List<Pen> t = new ArrayList<>();t.add(new Pen("B",3));t.add(new Pen("A",6));Collections.sort(t);for(Pen x: t) System.out.print(x);System.out.println();}
t.add(new Pen("C",4));
t.add(new Pen("D",7));t.add(new Pen("C",5));
}
A. (A,6) (B,3) (C,4) (C,5) (D,7)
B. (D,7) (C,5) (C,4) (B,3) (A,6)
C. (B,3) (C,5) (D,7) (C,4) (A,6)
D. (B,3) (C,4) (C,5) (A,6) (D,7)
