使用Java中的变量访问对象的属性

Question

public class myClass {    private Object myObject;    public myClass() {        myObject = new myObjectClass();    }    private class myObjectClass {        private int A = 1;        private int B = 5;    }    public int getMyObjectValue(String id) {        return myObject.[[[[id]]]];    }}我想得到这样的myObject财产：myClass.getMyObjectValue("A")在Javascript我们可以做myObject[id];我怎样才能改变return myObject.[[[[id]]]];它的工作？

Answer 1

有关反射的更多信息https://docs.oracle.com/javase/tutorial/reflect/

Object someObject = myObject();

for (Field field : someObject.getClass().getDeclaredFields()) {

    field.setAccessible(true); // You might want to set modifier to public first.

    Object value = field.get(someObject); 

    if (value != null) {

        System.out.println(field.getName() + "=" + value);

    }

}