Recursive list fields, Java

Recursive list fields

//'main' method must be in a class 'Rextester'.
//Compiler version 1.8.0_111

import java.util.*;
import java.lang.*;
import java.lang.reflect.*;

class MyInnerClass {
    private List<String> list;
}

class MyMidClass {
    private List<MyInnerClass> list;
}

class MyOuterClass {
  private List<MyMidClass> list;
}

class Rextester
{  
    public static void main(String args[])
    {
        recursivelyPrintListField(MyOuterClass.class);
    }
    
    private static void recursivelyPrintListField(Class<?> clazz)  {
        Field field = null;
        try {
            field = clazz.getDeclaredField("list");
        } catch (NoSuchFieldException e) {
            System.out.println("No more list field");
            return;
        }

Type genericFieldType = field.getGenericType();

if(genericFieldType instanceof ParameterizedType){
            ParameterizedType aType = (ParameterizedType) genericFieldType;
            Type[] fieldArgTypes = aType.getActualTypeArguments();
            for(Type fieldArgType : fieldArgTypes){
                Class<?> fieldArgClass = (Class<?>) fieldArgType;
                System.out.println("field type = " + fieldArgClass);
                recursivelyPrintListField(fieldArgClass);
            }
        }
    }
}


run \| edit \| history \| help	0

λ

                                      .NET NoSQL database for rapid development