CORE JAVA CHEATSHEET Learn JAVA - Edureka
CORE JAVA CHEATSHEET
Java Programming
Java is a high level, general purpose programming language that produces software for multiple platforms. It was developed by James Gosling in 1991 and released by Sun Microsystems in 1996 and is currently owned by Oracle.
Primitive Data Types
Type Size Range
byte
8
short 16
int
32
long
64
float
32
double 64
char 16
Boolean 1
-128..127 -32,768..32,767 -2,147,483,648.. 2,147,483,647 9,223,372,036,854,775,808.. 9,223.. 3.4e-0.38.. 3.4e+0.38 1.7e-308.. 1.7e+308 Complete Unicode Character Set True, False
Java Operators
Type
Arithmetic Assignment Bitwise Logical Relational Shift Ternary Unary
Operators
+, ? , *, ? , % =, +=, -=, *=, /=, %=, &=, ^=, |=, =, >>>= ^, &, | &&, || , =,==, != , >>> ? : ++x, ?x, x++, x?, +x, ?x, !, ~
Java Variables {public|private} [static] type name [= expression|value];
Java Methods
{public|private} [static] {type | void} name(arg1, ..., argN ){statements}
Data Type Conversion
// Widening (byte ................
................
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