Question 1

Write a program to demonstrate use of different operators in Java.

Accepted Answer

Java operators are special symbols used to perform operations on variables and values. They are fundamental building blocks for any program, enabling computations, comparisons, logical evaluations, and assignments. As discussed in the BCSL-146 course, understanding different operator types is crucial for writing effective Java code.

Here's a Java program demonstrating the use of various operators, along with explanations of their functionality and output.

```java
public class OperatorDemo {

Question 2

Write java programs to demonstrate use of abstract class and interface. Make necessary assumptions.

Accepted Answer

In Java's Object-Oriented Programming (OOP) paradigm, abstract classes and interfaces are fundamental constructs for achieving abstraction and defining contracts. They allow developers to create flexible, extensible, and maintainable codebases by establishing blueprints for classes and specifying behaviors without detailing their implementation. Understanding their distinctions and applications is crucial for robust software design.

An **abstract class** is a class that cannot be instantiated

Question 3

Write a java program to demonstrate use of thread priority and how interthread communications take place.

Accepted Answer

In Java, multithreading allows a program to execute multiple parts concurrently. Managing these concurrent tasks often involves setting thread priorities and enabling inter-thread communication. Thread priority is a hint to the thread scheduler about the relative importance of a thread, while inter-thread communication mechanisms facilitate safe data sharing and coordination among threads.

Thread priorities in Java are integers ranging from `Thread.MIN_PRIORITY` (1) to `Thread.MAX_PRIORITY` (1

Question 4

Write java program to demonstrate useJavaFX in GUI development.

Accepted Answer

JavaFX is a powerful and modern toolkit for developing Rich Client Applications (RCAs) using Java. It provides a comprehensive set of APIs for creating graphical user interfaces (GUIs), handling events, and incorporating multimedia elements. As outlined in the BCSL-146 course material, JavaFX offers a robust framework for building interactive and visually appealing desktop applications, replacing older technologies like Swing and AWT.

At its core, a JavaFX application extends the `javafx.applic

Question 5

Write a program using JDBC for developing simple CRUD application for billing of a Medical Store. Use appropriate GUI components in your application. Make necessary assumptions.

Accepted Answer

Developing a simple CRUD (Create, Read, Update, Delete) application for a medical store billing system using JDBC and appropriate GUI components in Java requires a structured approach, integrating database interaction with an intuitive user interface. This application will allow medical store personnel to manage product inventory and process sales efficiently. We will leverage Java's Swing library for GUI and JDBC for database connectivity, aligning with the principles taught in BCSL-146.

**1.

BCSL-146 Solved Assignment — January 2026 / July 2026

Object Oriented Programming using Java Lab | IGNOU Bachelor of Computer Applications (BCA_NEWOL)

BCSL-146—January 2026 / July 2026

Object Oriented Programming using Java Lab

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BCSL-146 Assignment Questions — January 2026

Q1. Write a program to demonstrate use of different operators in Java.

Q2. Write java programs to demonstrate use of abstract class and interface. Make necessary assumptions.

Q3. Write a java program to demonstrate use of thread priority and how interthread communications take place.

Q4. Write java program to demonstrate useJavaFX in GUI development.

Q5. Write a program using JDBC for developing simple CRUD application for billing of a Medical Store. Use appropriate GUI components in your application. Make necessary assumptions.