Java 实例以下实例演示了使用 BufferedWriter 类的 read 和 write 方法将文件内容复制到另一个文件：
Main.java 文件
import java.io.*; public class Main { public static void main(String[] args) throws Exception { BufferedWriter out1 = new BufferedWriter(new FileWriter("srcfile")); out1.write("string to be copied\n"); out1.close(); InputStream in = new FileInputStream(new File("srcfile")); OutputStream out = new FileOutputStream (new File("destnfile")); byte[] buf = new byte[1024]; int len; while ((len = in.read(buf)) > 0) { out.write(buf, 0, len); } in.close(); out.close(); BufferedReader in1 = new BufferedReader(new FileReader("destnfile")); String str; while ((str = in1.readLine()) != null) { System.out.println(str); } in1.close(); }}
以上代码运行输出结果为：
string to be copied