IO流6 --- FileReader中使用read(char[] cbuf)读入数据 --- 技术搬运工（尚硅谷）

• FileReader 字符输入流

@Test
public void test2(){
    File file = new File("hello.txt");
    FileReader fr = null;
    try {
        fr = new FileReader(file);
        char[] cbuf = new char[5];
        //返回读取的长度
        int len;
        while ((len = fr.read(cbuf)) != -1){
            String str = new String(cbuf, 0, len);
            System.out.print(str);
        }
    } catch (FileNotFoundException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }finally {
        if (fr != null){
            try {
                fr.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}