src/org/nutz/repo/org/objectweb/asm/ByteVector.java
public ByteVector putByte(final int b) {
        int length = this.length;
        if (length + 1 > data.length) {
            enlarge(1);
        }
        data[length++] = (byte) b;
        this.length = length;
        return this;
    }
public ByteVector putByte(final int b) {
        int length = this.length;
        if (length + 1 > data.length) {
            enlarge(1);
        }
        data[length++] = (byte) b;
        this.length = length;
        return this;
    }
Puts a byte into this byte vector. The byte vector is automatically
enlarged if necessary.

@param b
a byte.
@return this byte vector.