In this lecture, we discuss creating classes and object in Java. I demonstrate how to use constructors and methods in a simple way using NetBeans.
The programs exercises used in the lecture are:
Task 1: Create a class Mystery with void method. Also create a constructor which has no return type. Declare an instance String Variable. Create an object of the class in the main method. Initialize the string variable in the constructor. Then print this initialized variable in the method. Then call this method using the object and check to see what gets printed.
Task 2: Create a public class Hope. Create a protected constructor and print values from 0 to 9 using the for() loop in the constructor. Print the values by creating an object of the class in the main method.
Task 3: Create a class name Pakistan having method void Pakistan. Either this code will compile or not. Write the code, compile and run it.
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