core java

• Unicode System in java
• OOPs concepts
• Polymorphism in java
• interface in java
• static keyword in java
• Tokenizing in java
• Enumeration or enums in java
• IS-A and HAS-A relationship in java
• Generic in java
• Coupling and Cohesion in java
• implements comparable
• use comparable and sort employee list based on id
• implements comparator
• implements toString()
• Override equals() and hashcode()
• Override toString() in java
• Iterate map elements
• Get prime number
• Regular expression
• Array through user input in java
• Sorting array using bubble sort
• Print 2D matrix
• print diamond shape
• print triangle shape
• Find factorial with recursion
• Fibonacci Series
• Reverse string in java
• check a number is armstrong or not  in java