Guava-IO

To byte stream / The tools and methods provided by the character stream

• ByteStreams: Provide right InputStream/OutStream The operation of

• CharStreams: Provide right Reader/Writer The operation of

To the source (Source) And exchange (Sink) The abstraction of

• The source is readable :ByteSource/CharSource

• Remittance is writable :ByteSink/CharSink

public class IoTest {
    public static void main(String[] args) throws IOException {
        CharSource charSource = Files.asCharSource(new File("SourceTest.txt"), StandardCharsets.UTF_8);
        CharSink charSink = Files.asCharSink(new File("TargerTest.txt"), StandardCharsets.UTF_8);
        // copy to charSink in 
        charSource.copyTo(charSink);
        // Read all 
        System.out.println(charSource.read());
        // Read first line 
        System.out.println(charSource.readFirstLine());
        // Read as immutable set 
        ImmutableList<String> strings = charSource.readLines();
        System.out.println(strings);
    }
}