How to declare instantiate java generic collect Yasser @Jobilize

Author: Yasser Ibrahim

Exam Permalink:

https://www.jobilize.com/java-certification-questions

Question Permalink:

https://www.jobilize.com/how-to-declare-instantiate-java-generic-collection

Question 75 / 297: What is the result of compiling and running the following program?

import java.util.ArrayList;
import java.util.List;

public class Tester {

	public static void main(String[] args) {
		
         List<String> list1 = new ArrayList<String>();//line 1
         List<Object> list2 = list1;//line 2
         list2.add(new Integer(12));//line 3
         System.out.println(list2.size());//line 4

	}
}

A Compilation error at line 1, must initialize the size

B Compilation error at line 2,Type mismatch, cannot convert from List<String> to List<Object>

C Compilation error at line 3, can add objects of type String only

D 1

<< First < Previous Next > Last >>

Explanation:

Type mismatch, can't convert from List<String> to List<Object>

Exam Home Page

https://www.jobilize.com/java-certification-questions

Oracle Certified Professional Java Programmer

Author:

JavaChamp TeamSenior Java Developer

QuizOver.com

Germany

Access: Public Instant Grading

Yasser IbrahimFounder

Jobilize.com

U.A.E.

Ask

	2 SCEA Java Architect By JavaChamp Team Start Exam
	6 Psychology MCQ 2010 2 Exam By John Gabrieli Start Exam
	1 AP 01 Human Body Anatomy Physiology Essay By OpenStax Start Flashcards
	9 Lec:9 Descriptive Statistics By Janet Forrester Start Quiz
	Spreadsheets MCQ By Ryan Lowe Start Quiz
	19 Sociology 19 Health and Medicine MCQ By OpenStax Start Quiz
	3 Biology 03 Biological Macromolecules MCQ By OpenStax Start Quiz
	15 Lec:15 Correlation Regression By Janet Forrester Start Quiz
	Thermal-Fluid Systems MCQ By Steve Gibbs Start Quiz
	6 AP 06 Skeletal System Essay By OpenStax Start Flashcards
©flickr: Miguel	Protozoal and Parasitic Infections By Cath Yu Start Quiz

Copy and paste the following HTML code into your website or blog.

Recipient name: *
Recipient email: *