Java Reflection Field Find findField(Class clazz, String name)

Description

find Field

License

Apache License

Declaration

public static Field findField(Class clazz, String name) 

Method Source Code

//package com.java2s;
//License from project: Apache License 

import java.lang.reflect.*;

import java.util.Objects;

public class Main {
    public static Field findField(Class clazz, String name) {
        return findField(clazz, name, (Class) null);
    }/* w  w  w .j  a  v a2 s  .co m*/

    public static Field findField(Class clazz, String name, Class type) {
        assert Objects.nonNull(clazz);
        assert (name != null || type != null);
        //        Assert.notNull(clazz, "Class must not be null");
        //        Assert.isTrue(name != null || type != null, "Either name or type of the field must be specified");

        for (Class searchType = clazz; !Object.class.equals(searchType)
                && searchType != null; searchType = searchType.getSuperclass()) {
            Field[] fields = searchType.getDeclaredFields();

            for (int i = 0; i < fields.length; ++i) {
                Field field = fields[i];
                if ((name == null || name.equals(field.getName()))
                        && (type == null || type.equals(field.getType()))) {
                    return field;
                }
            }
        }

        return null;
    }
}

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2. findField(Class clazz, String fieldName)
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