如何实现Java函数根据用户的选择返回类型？

public interface Result {
    void display();
}

public class StringResult implements Result {
    private String value;

    public StringResult(String value) {
        this.value = value;
    }

    @Override
    public void display() {
        System.out.println("String Result: " + value);
    }
}

public class IntegerResult implements Result {
    private int value;

    public IntegerResult(int value) {
        this.value = value;
    }

    @Override
    public void display() {
        System.out.println("Integer Result: " + value);
    }
}

public class ResultFactory {

    public static <T extends Result> T getResult(String choice, Object data) {
        if ("string".equalsIgnoreCase(choice)) {
            return (T) new StringResult((String) data);
        } else if ("integer".equalsIgnoreCase(choice)) {
            return (T) new IntegerResult((Integer) data);
        } else {
            throw new IllegalArgumentException("Unknown choice");
        }
    }
}

public class Main {
    public static void main(String[] args) {
        Result stringResult = ResultFactory.getResult("string", "Hello, World!");
        stringResult.display();

        Result integerResult = ResultFactory.getResult("integer", 123);
        integerResult.display();
    }
}