350 Mock Questions on SCJP 1.5 - JUST Rs.200 or 7 USD Send us mail to sales@javabeat.net more details Do you have paypal account? Click Here to pay now and get the questions.

SCJP 5.0 Objective - 6(10 Questions)

2) What will be the output of the following program?

package scjp5_0.chap06;

import java.util.Arrays;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;

public class Ques01 {

	public static void main(String[] args) {

		List<Box> boxes = Arrays.asList(new Box(10), new Box(-1), new Box(5), new Box(2));
		Collections.sort(boxes, new BoxComparator());

		for (Object box : boxes){
			System.out.print(((Box)box).getSize() + " ");
		}
	}
}

class Box{

	public int size;

	public Box(int size){
		this.size = size;
	}

	public int getSize(){
		return size;
	}
}

class BoxComparator implements Comparator<Box>{

	@Override
	public int compare(Box one, Box two) {

		if (one.getSize() == two.getSize()){
			return 0;
		}else if (one.getSize() < two.getSize()){
			return 1;
		}
		return -1;
	}
}

1. The program will throw a run-time ClassCastException.
2. The program will compile to produce the output '10 -1 5 2'.
3. The program will compile to produce the output '-1 2 5 10'.
4. The program will compile to produce the output '10 5 2 -1'.

Get more questions on SCJP 1.5 topics

Answer

2)d
The objects of type Box have been arranged in descending order and hence the output will be '10 5 2 -1'.

350 Mock Questions on SCJP 1.5 - JUST Rs.200 or 7 USD Send us mail to sales@javabeat.net more details