problem in enhanced for loop

[Prasanna RamKumar]

i tried to compile the program
but it is showing errors
should i use any commands to enable the feautures

  public class Test{
public static void main(String arr[])
{
int a[]={1,2,3,4,5};
 
for(int n: a)
System.out.println(n);
 

}
}  

[Keith Lynn]

I'm not getting any compile-time error.

Are you sure you are compiling with at least version 1.5?

The enhanced for loop was not added until version 1.5.

[Prasanna RamKumar]

yes iam compiling wiht the version of 1.5 only

[Keith Lynn]

Can you double-check that with javac -version?

What is the compile-time error that is reported?

[Prasanna RamKumar]

it is showing the version as java version 1.5.0 _06

the complie time errors generated are

; expected

and illegal start of expression

[Keith Lynn]

Are you compiling at the command line or in Eclipse?

[Prasanna RamKumar]

iam compiling at command prompt

[Keith Lynn]

When you got the version, did you type javac -version or java -version?

[Prasanna RamKumar]

java -version

[Keith Lynn]

That tells you the version of the runtime environment.

You need to type javac -version to find the version of the compiler you are using.

You will get a list of the options for javac when you type it, but at the top of the list, it will tell you the version of javac.
[ November 28, 2006: Message edited by: Keith Lynn ]

[Prasanna RamKumar]

that is not showing any information regarding version

[Keith Lynn]

You should get something like this.

C:\Documents and Settings\lynn>javac -version
javac 1.5.0_05
javac: no source files
Usage: javac <options> <source files>
where possible options include:
  -g                         Generate all debugging info

[Prasanna RamKumar]

iam compiling at command prompt

[Prasanna RamKumar]

C:>javac -version
invalid flag : -version
Usuage :javac <options> <source files>
where possible options include:

[Keith Lynn]

Try this and see if it works.

c:\progra~1\java\jdk1.5.0_06\bin\javac Test.java

[Prasanna RamKumar]

no still it doesnot work
it was showing the previous error
; expected
illegal start of expression
i think this was not the solution for the problem
--------------------------------

[Lalitha Gottumukkula]

Can you please post the complete error stack?
Also, what is there in your classpath and path variables?

-Lalitha

[Keith Lynn]

The only thing I can think of is that you may have some small typo between the source file you are compiling and the one that you posted.

As I said, I copied what you posted and was able to compile it and interpret it, and there weren't any compile-time or run-time errors.

[Prasanna RamKumar]

i have made the initial settings correctly
i have set the JAVA_HOME
and path in environment variables
the code i have pasted is what i have compiled

  public class Test{
public static void main(String arr[])
{
int a[]={1,2,3,4,5};
 
for(int n : a)
System.out.println(n);
 

}
}  

even i have checked the version
it is showing as 1.5.0_06

[Prasanna RamKumar]

can anyone give the solution for this problem

[Barry Gaunt]

Prasanna, this is what I get:

C:\temp>javac -version
javac 1.5.0_07
javac: no source files
Usage: javac <options> <source files>
where possible options include:
  -g                         Generate all debugging info
  -g:none                    Generate no debugging info
  -g:{lines,vars,source}     Generate only some debugging info
  -nowarn                    Generate no warnings
  -verbose                   Output messages about what the compiler is doing
  -deprecation               Output source locations where deprecated APIs are u
sed
  -classpath <path>          Specify where to find user class files
  -cp <path>                 Specify where to find user class files
  -sourcepath <path>         Specify where to find input source files
  -bootclasspath <path>      Override location of bootstrap class files
  -extdirs <dirs>            Override location of installed extensions
  -endorseddirs <dirs>       Override location of endorsed standards path
  -d <directory>             Specify where to place generated class files
  -encoding <encoding>       Specify character encoding used by source files
  -source <release>          Provide source compatibility with specified release
 
  -target <release>          Generate class files for specific VM version
  -version                   Version information
  -help                      Print a synopsis of standard options
  -X                         Print a synopsis of nonstandard options
  -J<flag>                   Pass <flag> directly to the runtime system
 
 
C:\temp>javac Test.java
 
C:\temp>java Test
1
2
3
4
5
 
C:\temp>
 

That's with your cut and pasted code.
So you must have a problem with your jdk installation. I think, like Keith, you are not actually using the Java 5.0 compiler.
[ November 29, 2006: Message edited by: Barry Gaunt ]

[Barry Gaunt]

Prasanna, please try to compile this:

class Test1 {
Integer i = 12;
}

If it compiles you are using the Java 5.0 compiler, otherwise 1.4 or earlier.

[Prasanna RamKumar]

iam getting compilation error and moreover
when i typed the javac -version it is showing invalid flag
but for java -version it is showing
1.5.0_06

[Barry Gaunt]

Then you are indeed not running the correct compiler.
What do you get when you type "echo %PATH%" (without quotes).
Please cut and paste the output here.

[Henry Wong]

Versions of javac prior to Java 5 actually didn't support the -version flag, so if the flag is invalid, then the version is prior to Java 5. You can also try....

javac -J-version

Henry

[Barry Gaunt]

Prasanna, if you tell us what your PATH variable (echo %PATH%) is set to, then we can probably tell you how to fix this problem.

[Abdul Rehman]

Originally posted by Henry Wong:
Versions of javac prior to Java 5 actually didn't support the -version flag, so if the flag is invalid, then the version is prior to Java 5.

This is the root of the problem. You are not using JDK (compiler) 5.0.

Regards,
Abdul Rehman.