void set(final int intVal) {
        this.type = 3 /* ClassWriter.INT */;
        this.intVal = intVal;
        this.hashCode = 0x7FFFFFFF & (type + intVal);
    }
Sets this item to an integer item.

@param intVal the value of this item.
src/main/java/com/alibaba/fastjson/asm/Item.java