Beginner Quizzes – Java Language Fundamentals

The following Java exercise(s) are designed for beginner level programmers. If the level is too hard, then I recommend reading my article about this topic, which offers a theoretical explanation including more exercises. .

Choose a level: Beginner  Intermediate  Advanced 

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Quiz 1: Java wrapper classes “Integer” objects

What happens when you try to compile and run the following program?

public class MyClass {

    public static void main(String[] args) {
        Integer integer1 = new Integer("5");
        Integer integer2 = new Integer("5");
        Object obj1 = (Object) integer1;
        Object obj2 = (Object) integer2;

        if (obj1.equals(obj2)) {
            System.out.print("e");
        } else {
            System.out.print("f");
        }
    }
}

Select the correct answer.



Please, leave your questions, feedback and suggestions in the comments below! If you need more explanation by any of the answers, just let me know to update it for you!

Quiz 2: Java Strings

What happens when you try to compile and run the following program?

class MyClass {

	public static void main(String[] args){
		String str1 = new String("string");
		String str2 = new String("string");
		if(str1 == str2) {
			System.out.print("n");
		}else {
			System.out.print("o");
		}
		if(str1.equals(str2)) {
			System.out.print("p");
		}else {
			System.out.print("q");
		}
	}
}

Select the correct answer.



Please, leave your questions, feedback and suggestions in the comments below! If you need more explanation by any of the answers, just let me know to update it for you!

Quiz 3: Using “String” method indexOf

What does the following code do?

public class MyClass {

	public void method(){
		String str = "abcde";
		System.out.print(str.indexOf("d"));
	}
	public static void main(String[] args){
		MyClass mc = new MyClass();
		mc.method();
	}
}

Select the correct answer.


Megisoft.com offers a practical method to learn and improve your Java skills. It avoids unnecessary long boring theoretical explanations, but it uses many exercises and quizzes. The author of Megisoft is Sar Maroof who has more than a decade of experience with web development mainly with Java, MySql, HTML and more..
Choose a level: Beginner  Intermediate  Advanced 

Suggested Articles:


Sar Maroof's New Book "Java Quizmaster For Beginners"
Author: Sar Maroof
Many years of experience with developing web applications mainly with Java.
Sun Certified JSP as well as EJB
CIW Certified Internet Webmaster
Applied Science in Physics HBO Amsterdam
Bachellor Science in Physics at Basra university.
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  1. The honetsy of your posting is there for all to see

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