This repository contains all the solved practice programs for the Java Internal 2 exam. The topics covered span from Day 9 to Day 14 of the course, covering advanced OOP concepts, exception handling, multithreading, wrapper classes, string handling, file handling, collections, generics, and lambda expressions.

Covered Topics (Days 9 - 14)

Day 9: Advanced OOP Concepts 💡

• Inner Classes
• Anonymous Classes
• Passing Objects as Arguments
• Returning Objects

Day 10: Exception Handling ⚠️

• Introduction to Exceptions
• Try Block
• Multiple Catch Clauses
• Nested Try Blocks
• Finally
• Throw and Throws
• User-Defined and Built-in Exceptions

Day 11: Multithreading 🧵

• Introduction to Threading
• Multi-Threading
• Runnable Interface
• Synchronization
• Inter-Thread Communication

Day 12: Wrapper Classes 📦

• Wrapper Classes
• Autoboxing

Day 13: String Handling 📝

• Introduction to Strings
• Mutable and Immutable Strings
• String, StringBuffer, and StringBuilder
• File Handling

Day 14: Collections 📚

• Collection Framework
• ArrayList
• Set
• Map
• Generics
• Lambda Expressions
• JAR File (Java Archive)