GitSharp/Non Trivial Java To CSharp Conversions

From eqqon

Revision as of 15:21, 22 August 2009 (view source) Henon (Talk | contribs) (New page: This page lists some commonly required analogues between Java and C# that are not so trivial. This collection has been compiled while porting GitSharp. === Unsigned right shift operat...) ← Older edit		Latest revision as of 15:33, 22 August 2009 (view source) Henon (Talk | contribs) m (→synchronized)
(5 intermediate revisions not shown)
Line 4:		Line 4:
	Java:		Java:
-	{{code|int a, b;	+	{{code|<nowiki>int a, b;
-	int i = (a + b) >>> 5;}}	+	int i = (a + b) >>> 5;</nowiki>}}
	C#:		C#:
-	{{code|int a, b;	+	{{code|<nowiki>int a, b;
-	int i = (int)(((uint)(a + b)) >> 5)}}	+	int i = (int)(((uint)(a + b)) >> 5)</nowiki>}}
-		+
	=== string.Substring===		=== string.Substring===
-	Java:	+	Java
	{{code|someString.substring(int, int)}}		{{code|someString.substring(int, int)}}
		+	C#<br>
	An extension method that resembles the Java version is available in GitSharp.Util:		An extension method that resembles the Java version is available in GitSharp.Util:
-
-	C#:
	{{code|someString.Slice(int, int)}}		{{code|someString.Slice(int, int)}}
Line 27:		Line 25:
	Java:		Java:
-	{{code|int i = 0100644;}}	+	{{code|<nowiki>int i = 0100644;</nowiki>}}
	C#		C#
-	{{code|int i = 33188;}}	+	{{code|<nowiki>int i = 33188;</nowiki>}}
	===  synchronized===		===  synchronized===
	Java:		Java:
-	{{code|synchronized void a_method() { ... }}}	+	{{code|<nowiki>synchronized void a_method() { ... }</nowiki>}}
	C#		C#
-	{{code|[MethodImpl(MethodImplOptions.Synchronized)]	+	{{code|<nowiki>[MethodImpl(MethodImplOptions.Synchronized)]
-	public void a_method() { ... }}}	+	public void a_method() { ... }</nowiki>}}
-	When inlined, synchronized(this) is of course equivalent to lock(this)	+	When inlined, synchronized(this) is of course equivalent to the c# keyword lock(this)
	===  Streams and Buffers===		===  Streams and Buffers===
Line 49:		Line 47:
	C#		C#
	{{code|new BinaryWriter(new MemoryStream());}}		{{code|new BinaryWriter(new MemoryStream());}}
		+
		+	=== Integer.parseInt( string s, int radix) ===
		+
		+	This parses a string s using the base radix and converts it to decimal.
		+
		+	Java
		+	{{code|Integer.parseInt( "FF", 16)}}
		+
		+	C#
		+	{{code|NB.BaseToDecimal("FF", 16)}}
		+
		+	Note, NB is a class in the namespace GitSharp.Util.

---

Latest revision as of 15:33, 22 August 2009

This page lists some commonly required analogues between Java and C# that are not so trivial. This collection has been compiled while porting GitSharp.

Contents 1 Unsigned right shift operator (>>>) 2 string.Substring 3 Octal literals (i.e. 0001) 4 synchronized 5 Streams and Buffers 6 Integer.parseInt( string s, int radix)

Unsigned right shift operator (>>>)

Java:

int a, b; int i = (a + b) >>> 5;

C#:

int a, b; int i = (int)(((uint)(a + b)) >> 5)

string.Substring

Java

someString.substring(int, int)

C#
An extension method that resembles the Java version is available in GitSharp.Util:

someString.Slice(int, int)

Octal literals (i.e. 0001)

C# does not support octal literals (starting with a leading zero in java) and interprets them wrongly as decimal. You need to replace them by the corresponding decimal or hex literals.

Java:

int i = 0100644;

C#

int i = 33188;

synchronized

Java:

synchronized void a_method() { ... }

C#

[MethodImpl(MethodImplOptions.Synchronized)] public void a_method() { ... }

When inlined, synchronized(this) is of course equivalent to the c# keyword lock(this)

Streams and Buffers

Java

new ByteArrayOutputStream();

C#

new BinaryWriter(new MemoryStream());

Integer.parseInt( string s, int radix)

This parses a string s using the base radix and converts it to decimal.

Java

Integer.parseInt( "FF", 16)

C#

NB.BaseToDecimal("FF", 16)

Note, NB is a class in the namespace GitSharp.Util.