具体内容如下：

import sun.reflect.FieldAccessor; //导入依赖的package包/类
private FieldAccessor acquireFieldAccessor(boolean overrideFinalCheck) {
    // First check to see if one has been created yet, and take it
    // if so
    FieldAccessor tmp = null;
    if (root != null) tmp = root.getFieldAccessor(overrideFinalCheck);
    if (tmp != null) {
        if (overrideFinalCheck)
            overrideFieldAccessor = tmp;
        else
            fieldAccessor = tmp;
    } else {
        // Otherwise fabricate one and propagate it up to the root
        tmp = reflectionFactory.newFieldAccessor(this, overrideFinalCheck);
        setFieldAccessor(tmp, overrideFinalCheck);
    }

    return tmp;
}