guava/src/com/google/common/io/Files.java
public static CharSource asCharSource(File file, Charset charset) {
    return asByteSource(file).asCharSource(charset);
  }
public static CharSource asCharSource(File file, Charset charset) {
    return asByteSource(file).asCharSource(charset);
  }
public static CharSource asCharSource ( File file , Charset charset ) { return asByteSource ( file ) . asCharSource ( charset ) ; }
Returns a new {@link CharSource} for reading character data from the given file using the given
character set.

@since 14.0
Returns a new { @link CharSource } for reading character data from the given file using the given character set .