This code improvement found by Bill Pugh and David Hovemeyer's findbugs program.
David writes:




M RCN: Redundant comparison to null in java.io.InputStream.read(byte[],int,int) At InputStream.java:[line 177]

        b[off] = (byte)c;

        int i = 1;
        try {
            for (; i < len ; i++) {
                c = read();
                if (c == -1) {
                    break;
                }
                if (b != null) { // b can never be null here [line 177]
                    b[off + i] = (byte)c;
                }
            }
        } catch (IOException ee) {
        }
        return i;

This would just slow things down a little. The check can be removed.