Java BASIC Programming structure

notes:

1. Line comments//2. Block comments/* */3. Method Comment/** *

/

Data type:

Java is a strongly typed language that includes 8 basic data types and 3 reference data types, with basic data types including four integers (Byte,short,int,long), 2 floating-point types (float,double),    There are 1 character types used to represent Unicode encoded character cells char and one to represent the true worth of the Boolean type, 3 reference data types including arrays, classes, and interfaces. Conversions between data types: (dashed lines represent loss of precision, solid lines represent no loss of precision):

variables:

definition and initialization constants for variables (final decoration, usually full capitalization of constant names)

Operator:

self-increment decrement: ++,--relational operator: ==,! =,>,<,>=,<= ternary operator: Condition?expression1:expression2 bit operator:&,|,^,~,<<,>>,>>> Bar Piece Operator: &&,| | (Note the difference from &,|) mathematical functions and constants: Some functions and constants in the math class

string:

substring, concatenation, immutable string

Control Process:

condition, loop statement

Arrays and large values:

Big value: Biginteger,bigdecimal array: Definition, initialization, anonymous array, foreach Loop, array copy, Main method command line arguments, array sort, multidimensional array

From for notes (Wiz)

Java BASIC programming structure