从另一个泛型类中调用子变量

public class GenericClass<T> {
    private T variable;

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

    public T getVariable() {
        return variable;
    }
}

public class SubClass extends GenericClass<String> {
    private String subVariable;

    public void setSubVariable(String subVariable) {
        this.subVariable = subVariable;
    }

    public String getSubVariable() {
        return subVariable;
    }
}

public class Main {
    public static void main(String[] args) {
        SubClass subClass = new SubClass();
        subClass.setVariable("Hello");
        subClass.setSubVariable("World");

        System.out.println(subClass.getVariable());    // 输出：Hello
        System.out.println(subClass.getSubVariable()); // 输出：World
    }
}