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I have an object that has a String field. I can obtain this field by calling:

Field field = someObj.getClass().getField("strField");

I sett a Field#set(Object) method, for setting the value of this instance's field, but the respective getter seems to be Field#get(Object), which is weird because I would have expected it to be Field#get().

How do I obtain the value of the instance's strField?

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if you are using java.lang.reflect.Field, the "setter" is Field.set(Object,Object) and the "getter" is Field.get(Object). in both cases, the first parameter is the instance on which you want to access the field.

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3 Comments

Oh, he's really probably talking about java.lang.reflect.Field. Good catch!
@acdcjunior question was flagged with reflection tag so java.lang.reflect is first thing that comes in mind (at least for me :D). What was your other guess?
@Pshemo Yeah, I brain farted. I thought Field was the class of someObj and the setters for Field.strField were Field.set(Object) and Field.get(Object). His writing of Field#set(Object) (and not set(Obj,Obj)) made me completely misread the question.
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Even without the getter or the setter methods for a property, you can change or get the value using an object reference and Java Reflection.

import java.lang.reflect.Field;

public class Bean {

    private String strField;

    public static void main(String[] args) throws Exception {
        Bean bean = new Bean();
        Field field = bean.getClass().getDeclaredField("strField");
        field.set(bean, "Hello");
        System.out.println(field.get(bean));
    }

}
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Easiest way is to use BeanUtils:

String s = BeanUtils.getProperty(someObj, "strField");

Note that BeanUtils will attempt to convert your property into string. You need to have a getter and setter of the property

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