📚 Java Lab Programs

A complete collection of Java Lab Programs demonstrating core Java concepts for lab practice and placement preparation.

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✅ Programs Covered

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1️⃣

i. Write a JAVA Program to demonstrate Constructor Overloading and Method Overloading.

• Prog1a.java

ii. Write a JAVA Program to implement Inner Class and demonstrate its Access Protection.

• Prog1b.java

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2️⃣

Write a program in Java for String handling which performs the following:
i. Checks the capacity of StringBuffer objects.
ii. Reverses the contents of string given on console and converts the resultant string to uppercase.
iii. Reads a string from console and appends it to the resultant string.

• Prog2.java

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3️⃣ A

i. Write a JAVA Program to demonstrate Inheritance.

• Prog3a.java(Simple Inheritance)

ii. Simple Program in Java for the implementation of Multiple Inheritance using Interfaces to calculate the area of a rectangle and triangle.

• Prog3b.java

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4️⃣

Write a JAVA program which has:
i. A Class called Account that creates an account with ₹500 minimum balance, a deposit() method to deposit amount, a withdraw() method to withdraw amount and throws LessBalanceException if an account holder tries to withdraw money which makes the balance less than ₹500.

• Account.java

ii. A Class called LessBalanceException which returns a statement that says withdraw amount (Rs) is not valid.

• LessBalanceException.java

iii. A Class which creates 2 accounts, both deposit money and one tries to withdraw more money which generates LessBalanceException and takes appropriate action.

• BankDemo.java

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5️⃣

**Write a JAVA program using Synchronized Threads, which demonstrates the Producer-Consumer concept.

• ProducerConsumerDemo.java

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6️⃣

**Write a JAVA program to implement a Queue using User Defined Exception Handling (also make use of throw, throws).

• QueueDemo.java

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7️⃣

Complete the following:
i. Create a package named shape.
ii. Create classes in the package representing common shapes like Square, Triangle, and Circle.
iii. Import and compile these classes in another program.

• shape/Square.java
• shape/Triangle.java
• shape/Circle.java
• TestShapes.java

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8️⃣

Write a JAVA Program to create an enumeration DayOfWeek with seven values SUNDAY through SATURDAY. Add a method isWorkday() to the DayOfWeek class that returns true if the value on which it is called is MONDAY through FRIDAY. For example, the call DayOfWeek.SUNDAY.isWorkday() returns false.

• DayOfWeekTest.java

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9️⃣

Write a JAVA program which has:
i. An Interface for Stack Operations
ii. A Class that implements the Stack Interface and creates a Fixed Length Stack
iii. A Class that implements the Stack Interface and creates a Dynamic Length Stack
iv. A Class that uses both Stacks through Interface reference and does Stack operations to demonstrate Runtime Binding.

• StackDemo.java

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🔟

**Write a JAVA program to print a Chessboard Pattern.

• ChessBoard.java

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1️⃣1️⃣

Write a JAVA Program which uses FileInputStream / FileOutputStream Classes.

• FileDemo.java

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1️⃣2️⃣

**Write JAVA programs which demonstrate utilities of LinkedList Class.

• LinkedListDemo.java

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1️⃣3️⃣

**Write a JAVA program to implement JDBC operations.

• JDBCOps.java

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🚀 How to Compile & Run

1️⃣ Open terminal in your project folder.
2️⃣ Compile any program:

javac ConstructorOverloading.java