Java读写文件

%创建文件%try {File f = new File("F:/read");if(!file.exists()){    f.mkdir();}File ff = new File(f,"demo.txt");if(!ff.exists()){    ff.createNewFile();}%写文件%FileWriter fw = new FileWriter("F:/read/demo.txt");fw.write("sdfsa");fw.close();%读文件%Char[] ch = new Char[1024];FileReader fr = new FileReader("F:/read/demo.txt");fr.read(ch);System.out.printf("读取到的是:"+ch);}catch(Exception e){}