静态方法和泛型

public class ResponseBean<T> {



	



    private int code;



    private String message;



    private String lang;



    private String accessToken;



 



    private String sign;



    private int source;



    private Date time;



    private T value;



 



    public ResponseBean() {



 



    }



 



    private ResponseBean(int code, T value) {



        this(code, value, "");



    }



 



    private ResponseBean(int code, T value, String message) {



        this.time = new Date();



        this.lang = "zh_Cn";



        this.source = 201;



        this.code = code;



        this.value = value;



        this.message = message;



        



    }



    



    private ResponseBean(int code, String message) {



        this.time = new Date();



        this.lang = "zh_Cn";



        this.source = 201;



        this.code = code;



        this.message = message;



    }



 



    public static <T> ResponseBean<T> error(String msg,  T data) {



        return new ResponseBean<>(200, data, msg);



    }



 



    省略get（）set()方法



}

静态方法不能访问类中定义的泛型，如果静态方法中数据类型不确定，可以在方法上定义泛型。

即上例中<T>就是声名一个泛型T，之后两个T是在使用泛型T。

原文地址：https://blog.csdn.net/m18870420619/article/details/79929316