IdentityCheck - Revision history

217.77.54.83 at 22:38, 4 June 2009

2009-06-04T22:38:55Z

←Older revision		Revision as of 22:38, 4 June 2009
Line 6:		Line 6:
	</source>		</source>
	<source lang="java">		<source lang="java">
-	public static ~~void~~ sayHello() {	+	public static String sayHello() {
	String s1 = "Hello";		String s1 = "Hello";
	String s2 = " World!";		String s2 = " World!";

PetrSmid at 13:14, 26 March 2009

2009-03-26T13:14:59Z

←Older revision		Revision as of 13:14, 26 March 2009
Line 7:		Line 7:
	<source lang="java">		<source lang="java">
	public static void sayHello() {		public static void sayHello() {
-	~~return~~ "Hello" + " World!";	+	String s1 = "Hello";
		+	String s2 = " World!";
		+	return s1 + s2;
	}		}
	</source>		</source>

JaroslavTulach at 20:37, 9 March 2009

2009-03-09T20:37:50Z

←Older revision		Revision as of 20:37, 9 March 2009
Line 1:		Line 1:
	Is there an externally observable difference between following programs?		Is there an externally observable difference between following programs?
		+	<source lang="java">
	public static String sayHello() {		public static String sayHello() {
	return "Hello World!";		return "Hello World!";
	}		}
		+	</source>
		+	<source lang="java">
	public static void sayHello() {		public static void sayHello() {
	return "Hello" + " World!";		return "Hello" + " World!";
	}		}
		+	</source>

	Of course, there is! Just call the method twice:		Of course, there is! Just call the method twice:

JaroslavTulach: New page: Is there an externally observable difference between following programs? public static String sayHello() { return "Hello World!"; } public static void sayHello() { return "Hello" + " ...

2009-03-09T20:37:06Z

New page: Is there an externally observable difference between following programs? public static String sayHello() { return "Hello World!"; } public static void sayHello() { return "Hello" + " ...

New page

Is there an externally observable difference between following programs?
public static String sayHello() {
return "Hello World!";
}
public static void sayHello() {
return "Hello" + " World!";
}

Of course, there is! Just call the method twice:

<source lang="java">
assert sayHello() == sayHello();
</source>

The first version of the method passes the [[IdentityCheck]] test. The second does not. There are also other differences in [[MemoryAllocations]] as well as [[StringsUsedInConstantPool]].

[[Category:APITypes]]