以下实例演示了使用 filewriter 方法向文件中追加数据：
/* author by w3cschool.cc main.java */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：
astring1 astring2
以上就是java 实例 - 向文件中追加数据的内容。