如何指定反演父字段的子类

// 定义父类
class Parent {
    protected String parentField;

    public Parent(String parentField) {
        this.parentField = parentField;
    }

    public void printParentField() {
        System.out.println("Parent Field: " + parentField);
    }
}

// 定义子类，继承父类
class Child extends Parent {
    private String childField;

    public Child(String parentField, String childField) {
        super(parentField);
        this.childField = childField;
    }

    public void printChildField() {
        System.out.println("Child Field: " + childField);
    }
}

// 创建子类对象并使用
Child child = new Child("Parent Field Value", "Child Field Value");
child.printParentField();  // 输出：Parent Field: Parent Field Value
child.printChildField();   // 输出：Child Field: Child Field Value