day18/day18_IO/FileWriterDemo1.java

/*IO异常处理*/import java.io.*;class FileWriterDemo1 {public static void main(String[] args) {FileWriter fw = null;try{fw = new FileWriter("demo.txt");fw.write("adfjalfj");}catch (IOException e){System.out.println(e.toString());}finally{try{if(fw!=null)fw.close();}catch (IOException e){System.out.println(e.toString());}}}}