Core Java

GENARAL JAVA

• How to create immutable classes in java

JAVA I/O TUTORIAL

• Traverse Directory Structure
• java program to read file line by line
• Sort content in a txt file 
• java program to read properties file
• java program to write properties file  
• serialization in java
• deserialization in java
• Externalization in java
• Deexternalization in java

Strings

• java program to separate alphabets and numbers from string
• java program to convert string to char array 
• java program to convert char array to String

Arrays      

• java program to find min and max value in array
• java program to sort an array 
• java program to reverse an array without creating another array 
• java program to check duplicates in array 
• java program to find second largest number in an array

Collections Framework

•  converting array to list
• converting list to array 
• shuffle the element of list 
• swap list elements example
• converting array to set 
• converting set to array
•  sorting collection or array of strings
• Looping /Iterating a List 
• Find min and max value of arraylist 
• creating unmodifiable list 
• get synchronized list from arraylist
• reverse string array
• sorting arraylist in descending order using comparator 
• Looping/Iterating a Map 
• converting set to list 
• removing duplicates from array 
• sort objects with comparable 
• NavigableMap Example