I can't see the error

[Stefan Ram]

I wrote:

public static void mergeContentsOf
( final java.nio.file.Path source,
final java.lang.String description,
final java.nio.file.Path newTarget )
throws java.lang.Exception
{ final java.nio.file.DirectoryStream directoryStream =
source.newDirectoryStream( "*" );
try
{ for( final java.nio.file.Path path : directoryStream )
{ merge( path, description, newTarget ); }}
finally
{ directoryStream.close(); }}

, the compiler replied:

Main.java:9: incompatible types
{ for( final java.nio.file.Path path : directoryStream )
^
required: Path
found: Object
1 error

, but I can't see any expression of type »Object«.

$javac -version -verbose
javac 1.7.0-ea

 

[Michael Jung]

public static void mergeContentsOf
( final java.nio.file.Path source,
final java.lang.String description,
final java.nio.file.Path newTarget )
throws java.lang.Exception
{ final java.nio.file.DirectoryStream directoryStream =
source.newDirectoryStream( "*" );
try
{ for( final java.nio.file.Path path : directoryStream )
{ merge( path, description, newTarget ); }}
finally
{ directoryStream.close(); }}

, the compiler replied:

Main.java:9: incompatible types
{ for( final java.nio.file.Path path : directoryStream )
^
required: Path
found: Object
1 error

, but I can't see any expression of type »Object«.

$javac -version -verbose
javac 1.7.0-ea

DirectoryStream returns an untyped iterator, ie. one which gives you an
"Object" for each step. (And this is behind the java-shorthand ":"
notation.)

Michael

 

[Andreas Leitgeb]

public static void mergeContentsOf
( final java.nio.file.Path source,
final java.lang.String description,
final java.nio.file.Path newTarget )
throws java.lang.Exception
{ final java.nio.file.DirectoryStream directoryStream =
source.newDirectoryStream( "*" );
try
{ for( final java.nio.file.Path path : directoryStream )

Just guessing:
final java.nio.file.DirectoryStream<Path> directoryStream =

Don't have 1.7 here to test myself.

 

[Stefan Ram]

Just guessing:
final java.nio.file.DirectoryStream<Path> directoryStream =

This guess was correct.

 

[John B. Matthews]

DirectoryStream returns an untyped iterator, ie. one which gives you
an "Object" for each step. (And this is behind the java-shorthand ":"
notation.)

I don't follow; java.nio.file.DirectoryStream extends
java.lang.Iterable<T>, and the iterator is of type
java.util.Iterator<T>.

<http://download.oracle.com/javase/7/docs/api/java/nio/file/DirectoryStream.html>