Dartでファイルから1バイト読み込もうとする

out1

dartcでコンパイルしようとした場合次のようになる

ranha@ranha:~/dart_full/dart$ ./out/Debug_ia32/dartc ~/dart/read1bytefromfile.dart
file:/home/ranha/dart/read1bytefromfile.dart/read1bytefromfile.dart:9: no such type "File"
     8: main() {
     9:        var f = new File("read1bytefromfile.dart",false);

file:/home/ranha/dart/read1bytefromfile.dart/read1bytefromfile.dart:9: New expression does not resolve to a constructor
     8: main() {
     9:        var f = new File("read1bytefromfile.dart",false);

Compilation failed with 2 problems.

out2

dartでは実行出来る

% dart_bin read1bytefromfile.dart
#

read1bytefromfile.dart

#import("dart:coreimpl");

String char2string(int char)
{
	return StringBase.createFromCharCodes([ char ]);
}

main() {
       var f = new File("read1bytefromfile.dart",false);
       int i = f.readByte();

       print(char2string(i));
}