src/org/nutz/repo/org/objectweb/asm/ClassWriter.java
public int newField(final String owner, final String name, final String desc) {
        return newFieldItem(owner, name, desc).index;
    }
public int newField(final String owner, final String name, final String desc) {
        return newFieldItem(owner, name, desc).index;
    }
Adds a field reference to the constant pool of the class being build.
Does nothing if the constant pool already contains a similar item.
<i>This method is intended for {@link Attribute} sub classes, and is
normally not needed by class generators or adapters.</i>

@param owner
the internal name of the field's owner class.
@param name
the field's name.
@param desc
the field's descriptor.
@return the index of a new or already existing field reference item.