无法将类字段加载到子类中

class Parent {
    protected int parentField; // 受保护的字段，子类可以访问

    public Parent() {
        this.parentField = 10;
    }
}

class Child extends Parent {
    public void printParentField() {
        System.out.println("Parent Field: " + parentField); // 可以访问父类的受保护字段
    }
}

public class Main {
    public static void main(String[] args) {
        Child child = new Child();
        child.printParentField(); // 输出: Parent Field: 10
    }
}

class Parent {
    private int privateField;

    public Parent() {
        this.privateField = 20;
    }

    public int getPrivateField() {
        return privateField;
    }
}

class Child extends Parent {
    public void printPrivateField() {
        System.out.println("Private Field: " + getPrivateField()); // 通过 getter 方法访问
    }
}

public class Main {
    public static void main(String[] args) {
        Child child = new Child();
        child.printPrivateField(); // 输出: Private Field: 20
    }
}