Java in 25 hour 3

1-java
2-jvm,jre,jdk
3-datatypes
4-class and objects
5-contructors and methods
6-variables
7-modifiers
8-operators
9-Typecasting and Boxing and inboxing
10-Inner classes
11-Packages
oops-
12- 1-inheritance-aggregation-composition
13- 2-polymorphism-compile and runtime
14- this and super keywords
15- 3-abstraction
-interface
16- 4-encapsulation
17-arrays
18-String handling
19-collection framework
20-exception handling
21-I/O Api-serialization
22-multithreading-synchronization
23-reflection api
24-Design Pattern
25-jdbc

+ requested topic/ code
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