將文字寫入 UTF-8 檔案

import java.io.BufferedWriter;
import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.nio.file.Paths;

public class WritingUTF8TextFile {
    public static void main(String[] args) throws IOException {
        //StandardCharsets is available since Java 1.7
        //for ealier version use Charset.forName("UTF-8");
        try (BufferedWriter wr = Files.newBufferedWriter(Paths.get("test2.txt"), StandardCharsets.UTF_8)) {
            wr.write("Cyrillic symbol Ы");
        }
    }
}