DATA STRUCTURE AND ALGORITHM DAY 2

Type casting

converting a varlable from one data type to another.

int to String

String age = String.value Of(myAge);

String to Int

Integer.parselnt("123”);

Object to String

obj.toString();

Int to Double (implicit)

double num1 = 123;

int to float (implicit)

float num1 = 123;

int to double

double myDouble = (double) myInt;

int to float (implicit)

float myFloat = myInt;

double to int (explicit)

int myInt = (int) myDouble;

float to int (explicit)

int myInt = (int) myFloat;

Array

FIXED SIZED CONTAINER

ArrayList

RESIZABLE ARRAY FROM JAVA. UTIL

Linked List

Double linked list

Stack

Last In First Out (LIFO)

Queue

First in First Out (FIFO)

Hash Set

UNORDERED COLLECTION OF UNIQUE ELEMENTS

Treeset

SORTED TYPE OF HASH SET

Hashmap

KEY - VALUE PAIR FOR FAST LOOK UP

Treemap

Sorted Key-value Pair

Primitive

Data type that cant use attribute

Non Primitive

Data type that you can use a attribute