使用Java修改文件的内容

我将从关闭阅读器和刷新书写器开始：

public class FileReplace {    List<String> lines = new ArrayList<String>();    String line = null;    public void  doIt() {        try { File f1 = new File("d:/new folder/t1.htm"); FileReader fr = new FileReader(f1); BufferedReader br = new BufferedReader(fr); while ((line = br.readLine()) != null) {     if (line.contains("java"))         line = line.replace("java", " ");     lines.add(line); } fr.close(); br.close(); FileWriter fw = new FileWriter(f1); BufferedWriter out = new BufferedWriter(fw); for(String s : lines)      out.write(s); out.flush(); out.close();        } catch (Exception ex) { ex.printStackTrace();        }    }    public static void main(String args[]) {        FileReplace fr = new FileReplace();        fr.doIt();    }}