Java

Java Basic

• Primitive Types
• Primitive Wrapper Types
• Primitive pass by value, Object passed by reference
• Incremental Operators
• Number Type Promotion and Casting
• Equality Operators
• Access modifier and optional modifier
• Method overloaded and rules
• Java Hexadecimal
• Java Octal

Array and ArrayList

• Array & ArrayList
• Array & ArrayList Conversion
• Array Sorting & Binary Search
• Array Copy
• Remove duplication
• PrimitiveWrapper Array Conversion

Java 8, Time Related

• Java - Period
• Java - Instant
• Java - DateTimeFormatter

Interface

Generic Interface

Simple Type Interface

• Functional Interface
• Lambda

• Predicate - T in, boolean out
• Function - T in, R out
• Consumer - T in, nothing out (void)
• Supplier - Nothing in, T out
• BinaryOperator - 2 T in, T out

• IntPredicate, DoublePredicate, LongPredicat
• LongUnaryOperator, DoubleUnaryOperator, IntUnaryOperator
• DoubleBinaryOperator, IntBinaryOperator, LongBinaryOperator
• IntConsumer, LongConsumer, DoubleConsumer

String

• Concatenation & performance
• String Palindrome

Input & Output

• InputStream - Scanner
• Java Console
• InputStreamReader & BufferReader
• ByteArrayInputStream
• Read Input From File

Others

• Character Input, IsDigit
• TwoSum