Intermediate quizzes – Java classes and objects

The following Java exercise(s) are designed for intermediate level programmers. If the level is too hard, then I recommend to select an easier one or you might consider reading my article about this topic, which offers a theoretical explanation including more exercises. Read More: Java Classes And Objects.


Quiz 1: Instantiating an object

What happens when the following program is compiled and run?

public class MyClass {

	int m = 4;
	int n = 5;
	String s = "z";

	MyClass(int m, int n, String s) {
		m -- ;
		System.out.print("-x" + m);
		this.n = 2;
		this.s = s;
		System.out.print("-x" + n);
		this.m += 2;
	void method(int m, int n, String s){
		this.s = s;
		System.out.print("-x" + this.m + "-x" + this.n);
	public static void main(String[] args){
		MyClass mc = new MyClass(1,6,"h");

Select the correct answer.

Sar Maroof is a professional software development teacher, gives master classes and publishes technical articles. He is also an expert software developer and worked for several big as well as small companies and later as a freelancer.
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