InputStream class

这个函数是InputStream类中len长的字节数独到b数组中，个人认为写得很好。

 

public int read(byte b[], int off, int len) throws IOException {if (b == null) { throw new NullPointerException();} else if (off < 0 || len < 0 || len > b.length - off) { throw new IndexOutOfBoundsException();} else if (len == 0) { return 0;}int c = read();if (c == -1) { return -1;}b[off] = (byte)c;int i = 1;try { for (; i < len ; i++) {c = read();if (c == -1) { break;}b[off + i] = (byte)c; }} catch (IOException ee) {}return i; }