jodd-core/src/main/java/jodd/util/StringBand.java
public StringBand append(String s) {
		if (s == null) {
			s = StringPool.NULL;
		}

		if (index >= array.length) {
			expandCapacity();
		}

		array[index++] = s;
		length += s.length();
		
		return this;
	}
public StringBand append(String s) {
		if (s == null) {
			s = StringPool.NULL;
		}

		if (index >= array.length) {
			expandCapacity();
		}

		array[index++] = s;
		length += s.length();
		
		return this;
	}
Appends a string.