Java知识点总结（JavaiO-转换流）

@(Java知识点总结)[Java, JavaIO]

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OutputStreamWrITer

是Writer的子类，将一个字符流的输出对象变为字节流的输出对象。

InputStreamReader

是Reader的子类，将一个字节流的输入对象变为字符流的输入对象。

public  class Demo05 {     // 将字节输出流转为字符输出流   public static void test1() throws IOException {     File file = new File("E:" + File.separator + "test.txt");          Writer out = new OutputStreamWriter(new FileOutputStream(file)); // 字节流转为字符流          out.write("苹果");     out.close();     }     // 将字节输入流转为字符输入流   public static void test2() throws IOException {     File file = new File("E:" + File.separator + "test.txt");          Reader input = new InputStreamReader(new FileinputStream(file));     char[] c = new char[@H_275_126@1024];     int len = input.read(c);          input.close();     System.out.PRintln("内容是：" +new String(c,0,len));   }     public static void main(String[] args) {     try {        test1();        test2();     } catch (IOException e) {       e.printStackTrace();     }   } }