C# for Java Developer_print - Microsoft Download Center

# C

for Java Developers

Keywords Java

C#

Java

C#

abstract

abstract

native

extern

assert

Debug.Assert (method) break case catch class const continue

new

new

null package private protected public return

null namespace private internal public return

break case catch class const continue default do else enum extends false final finally for

goto if implements import instanceof interface

default do else enum : false sealed finally for / foreach goto if : using is interface

static strictfp super switch synchronized this throw throws transient true try … (varargs) void volatile while

static n/a base switch lock this throw n/a [Nonserialized] (attribute) true try params void volatile while

Note: The const and goto keywords in Java have no function. The C# const and goto keywords are operational.

Java

C#

Description

x.y

x.y

Java

Member access “dot” operator

boolean bool

f(x) a[x]

++, --

C# keywords not found in Java, or with different behavior Keyword

Description

Keyword

Description

base

Provides access to

operator

Declares an overloaded

members in a parent Enables arithmetic overflow checking

new

Declares an event

Increment and decrement operators (pre and post-

new

(T)x +, -

float

Object instantiation operator

int

Type verification operator

(T)x

long

Explicit cast operator

+, -

Addition and subtraction operators (binary). Positive and negative operators (unary)

+ !

&&, ||

+

String concatenation operator

!

Logical negation operator

&&, ||

Declares a widening

&, |, ^

n/a

Conditional AND, OR, and XOR operators (full evaluation of operands)

~

&, |, ^ >>>

*, /, % ==, !=

, = x?y:z

~

Bitwise complement operator

&, |, ^

Bitwise AND, OR, and XOR operators

n/a

Signed left-shift and right-shift operators

>>

Unsigned right-shift operator

*, /, %

Multiply, divide, and modulus operators

==, !=

Is-equal-to and is-not-equal-to operators

, =

Relational less-than, greater-than, less-than-or-equal-

x?y:z

Conditional operator

to, and greater-than-or-equal-to operators

=

Assignment operator

in

Declares a

that hides a method in a base class (method modifier)

231 to 231-1

-231 to 231-1

-263 to 263-1

-263 to 263-1

-215 to 215-1

-2 to 215-1

n/a

n/a

n/a

n/a

int

long

short

string object

9999

value

Datatype examples Java

C#

int i = 1; byte b = 1; double d = 1.1; long l = 1; short s = 1;

int i = 1; byte b = 1; double d = 1.1; long l = 1; short s = 1;

boolean found = true; char c = 'z'; String title = "Hello World";

bool found = true; char c = 'z'; string title = "Hello World";

operator Unsigned left-shift

sizeof(T)

compound assignment Null-coalescing operator

Returns the size of a

int data2[];

Properties Indexers

n/a

Lambda Expressions

type stackalloc

Allocates a block of memory on the stack

=>

Lambda expression

typeof(e)

operator as checked

Returns the type of an

Partial Classes

Enables arithmetic

unchecked unsafe

C# datatypes not provided as part of Java

Dynamic Runtime Language

Type

Range

Size(bits)

Structures

Disables arithmetic

decimal

28-29 significant figures

128

Operator Overloading

overflow checking

byte

0 to 255

8

Enables unsafe code

uint

232-1

32

ulong

0 to 264 -1

64

ushort

0 to 2 -1

16

expression

Safe casting operator

LINQ Events

Array examples

operator ??

C# Features Not Available in Java 6 Delegates

Declares an output

Declares a method that

1st Jan 0001 to 31st Dec

implementation dependent