小编Ran*_*der的帖子

下面提到的是 JSON 字符串，resultString：

{
"imageMaps": [{
        "crc": "c2c4",
        "flags": "0",
        "length": "117384",
        "index": 1,
        "version": "1.1.90ea",
        "status": ""
    }, {
        "crc": "7601",
        "flags": "8",
        "length": "117592",
        "index": 2,
        "version": "1.1.90ed",
        "status": ""
    }],
    "complete": true,
    "nextBootImageVersion": "",
    "lastKnownGoodImageVersion": "1.1.90ed",
    "runningImageVersion": "1.1.90ed"
}

我想将相同的转换为 A 类的对象：

public class A {

    private boolean complete;

    private String message;

    private String lastKnownGoodImageVersion;

    private String nextBootImageVersion;

    private String runningImageVersion;

    private Map<String, B> imageMaps;

    private  List<B> images;

    private MacID macId;

}

我正在尝试使用以下代码将 json 转换为 A 类的对象： …

我创建了一个通用方法toList():

public static <T> List<T> toList(T... args){
        List<T> list = new ArrayList<T>();
        for (T t : args) {
            list.add(t);
        }

        if(list instanceof Comparable<?>){
            System.out.println("The list was considered a list of Comparable objects");
        }
        if(list instanceof Serializable){
            System.out.println("The list was considered a list of Serializable objects");
        }
        if(list instanceof Object){
            System.out.println("The list was considered a list of Object class' objects");
        }
        return list;
    }

我称之为这样的方法:

    public static void main(String[] args) {

        System.out.println(Generics.<Comparable>toList(1,2,"3"));
  }

我期待,因为我提供了类型Comparable,第一个if条件将成立,o/p将是第一个Comparable,然后是Object.但令我惊讶的是,如果o/p是Serializable然后是Object,则控制权不会先进入.

任何人都可以对这背后的原因有所了解吗？另外,我不清楚在访问修饰符之后在方法签名中应用T的概念.

我们已经提到了访问说明符,修饰符和返回类型.供应T需要什么？