Java Reflection Field Set setField(Object object, String fieldName, int value)

Description

Sets a field value for the given object.

License

Open Source License

Parameter

Parameter	Description
object	the object that should be changed
fieldName	the name of the field
value	the value

Exception

Parameter	Description
NoSuchFieldException	when the field does not exist or could not be written

Declaration

public static void setField(Object object, String fieldName, int value) throws NoSuchFieldException 

Method Source Code

//package com.java2s;
import java.lang.reflect.Field;

public class Main {
    /**/*from   w w  w .  j av a2 s .c o m*/
     * Sets a field value for the given object.
     * 
     * @param object
     *            the object that should be changed
     * @param fieldName
     *            the name of the field
     * @param value
     *            the value
     * @throws NoSuchFieldException
     *             when the field does not exist or could not be written
     */
    public static void setField(Object object, String fieldName, int value) throws NoSuchFieldException {
        setField(object, fieldName, Integer.valueOf(value));
    }

    /**
     * Sets a field value for the given object.
     * 
     * @param object
     *            the object that should be changed
     * @param fieldName
     *            the name of the field
     * @param value
     *            the value
     * @throws NoSuchFieldException
     *             when the field does not exist or could not be written
     */
    public static void setField(Object object, String fieldName, Object value) throws NoSuchFieldException {
        try {
            Field field = null;
            Class instanceClass = object.getClass();
            while (field == null) {
                try {
                    field = instanceClass.getDeclaredField(fieldName);
                } catch (NoSuchFieldException e) {
                    instanceClass = instanceClass.getSuperclass();
                    if (instanceClass == null) {
                        throw e;
                    }
                }
            }
            field.setAccessible(true);
            field.set(object, value);
        } catch (SecurityException e) {
            e.printStackTrace();
            throw new NoSuchFieldException("Unable to set field [" + fieldName + "]: " + e.toString());
        } catch (IllegalArgumentException e) {
            e.printStackTrace();
            throw new NoSuchFieldException("Unable to set field [" + fieldName + "]: " + e.toString());
        } catch (IllegalAccessException e) {
            e.printStackTrace();
            throw new NoSuchFieldException("Unable to set field [" + fieldName + "]: " + e.toString());
        }
    }
}

Related

1. setField(Object object, Class clazz, String fieldName, Object value)
2. setField(Object object, Field field, Object value)
3. setField(Object object, Field field, Object value)
4. setField(Object object, Object value, String name)
5. setField(Object object, String field, Object value)
6. setField(Object object, String fieldName, Object newValue)
7. setField(Object object, String fieldName, Object newValue, boolean isFindDeclaredField, boolean isUpwardFind)
8. setField(Object object, String fieldName, Object value)
9. setField(Object object, String fieldName, Object value)