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JAVA
SPRING
ANGULAR
SQL
HTML
CSS
JAVASCRIPT
Data Structure
JDK vs JRE vs JVM
Java First Program
Java Variable
Data Types
Operators
Keywords and Identifiers
Modifier
Java-Methods
Final Keyword
Static Keyword
Constructor
if-else
do-while Loop
Switch case
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break
continue
Object and Class
Inheritance
Types of Inheritance
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Java Overloading
Java Overriding
Type casting Overview
Arrays Overview
String overview
Java collection
List
ArrayList
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HashSet
LinkedHashSet
TreeSet
Comparable and Comparator Interface
Generics
Map Interface overview
HashMap
TreeMap
HashTable
Cursors in Java
Types of Exception
Exception
Exception hierarchy
throw and throws keyword
Custom exception
Multitasking
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Constructors and Methods
Introduction to JDBC
CRUD operations
JDBC Architecture
Exercise: 1 Exercise: 2 Exercise: 3 Exercise: 4 Exercise: 5

Exercise Number: 1

Q. Create a TreeMap<String, Integer> to store student names and their marks. Add at least 3 entries and print them to observe the sorted order of keys.