在java中如何在运行时更改具体装饰器中的变量？

// Step 1: 创建接口
interface Component {
    void operation();
}

// Step 2: 创建具体的被装饰对象
class ConcreteComponent implements Component {
    @Override
    public void operation() {
        System.out.println("执行具体操作");
    }
}

// Step 3: 创建抽象装饰器类
abstract class Decorator implements Component {
    protected Component component;

    public Decorator(Component component) {
        this.component = component;
    }

    @Override
    public void operation() {
        component.operation();
    }
}

// Step 4: 创建具体的装饰器类
class ConcreteDecorator extends Decorator {
    private String variable;

    public ConcreteDecorator(Component component) {
        super(component);
    }

    public String getVariable() {
        return variable;
    }

    public void setVariable(String variable) {
        this.variable = variable;
    }

    @Override
    public void operation() {
        super.operation();
        System.out.println("修改的变量值：" + variable);
    }
}

// 使用示例
public class Main {
    public static void main(String[] args) {
        // 创建被装饰对象
        Component component = new ConcreteComponent();

        // 创建具体装饰器对象
        ConcreteDecorator decorator = new ConcreteDecorator(component);

        // 在运行时更改装饰器中的变量
        decorator.setVariable("修改后的值");

        // 调用装饰器对象的方法
        decorator.operation();
    }
}