Java 实例以下实例演示了使用 filewriter 方法向文件中追加数据：
Main.java 文件
import java.io.*; public class Main { public static void main(String[] args) throws Exception { try { BufferedWriter out = new BufferedWriter(new FileWriter("filename")); out.write("aString1\n"); out.close(); out = new BufferedWriter(new FileWriter("filename",true)); out.write("aString2"); out.close(); BufferedReader in = new BufferedReader(new FileReader("filename")); String str; while ((str = in.readLine()) != null) { System.out.println(str); } in.close(); } catch (IOException e) { System.out.println("exception occoured"+ e); } }}
以上代码运行输出结果为：
aString1aString2