Java Reflection Field Set setField(Object obj, String name, Object value)

Description

Set the value of this parameter.

License

Open Source License

Parameter

Parameter	Description
obj	Object whose attribute value to set.
name	Name of the attribute to retrieve.
value	Value to set the attribute to; can bei either an object, a wrapper for simple data types, or the stringified value of a simple data type.

Return

True if it worked, false else.

Declaration

public static boolean setField(Object obj, String name, Object value) 

Method Source Code

//package com.java2s;
/*/*from www .  ja v  a 2 s. com*/
 * ClassHelper.java
 *
 * Copyright (C) August Mayer, 2001-2004. All rights reserved.
 * Please consult the Boone LICENSE file for additional rights granted to you.
 *
 * Created on 16. Juni 2004, 22:57
 */

import java.lang.reflect.Method;

public class Main {
    /**
     * Set the value of this parameter.
     * The value can either be a suitable Java wrapper object,
     * or a String containing the stringified value of a simple data type.
     *
     * @param obj   Object whose attribute value to set.
     * @param name  Name of the attribute to retrieve.
     * @param value Value to set the attribute to; can bei either an object, a wrapper
     *              for simple data types, or the stringified value of a simple data type.
     *
     * @return True if it worked, false else.
     */
    public static boolean setField(Object obj, String name, Object value) {
        // first, find a setter method

        // note: if we find a method with the setter name, but with incompatible
        //  parameter signature, we just try to call it anyway, which fails, then continue;
        //  the right setter should come along eventually.

        String setterName = "set" + Character.toUpperCase(name.charAt(0)) + name.substring(1);
        Method[] methods = obj.getClass().getMethods();
        for (int i = 0; i < methods.length; i++) {
            if (methods[i].getName().equals(setterName)) {
                try {
                    methods[i].invoke(obj, new Object[] { value });
                    return true; // it worked?! YAY!
                } catch (Exception e) {
                } // just forget this and try again
            }
        }

        try {
            // then try to set the thing directly
            obj.getClass().getDeclaredField(name).set(obj, value);
            return true;
        } catch (Exception e) {
            return false;
        }
    }
}

Related

1. setField(Object obj, String fieldname, Object value)
2. setField(Object obj, String fieldName, Object value)
3. setField(Object obj, String fieldName, Object value)
4. setField(Object obj, String fieldName, Object value, Class valueClass)
5. setField(Object obj, String name, Object value)
6. setField(Object object, Class clazz, String fieldName, Object value)
7. setField(Object object, Class clazz, String fieldName, Object value)
8. setField(Object object, Field field, Object value)
9. setField(Object object, Field field, Object value)