Java Utililty Methods Reflection Field Value Set

List of utility methods to do Reflection Field Value Set

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Description

The list of methods to do Reflection Field Value Set are organized into topic(s).

Method

voidsetFieldValue(Class c, Object instance, String name, Object value)
set Field Value 
try {
    Field declaredField = c.getDeclaredField(name);
    declaredField.setAccessible(true);
    declaredField.set(instance, value);
} catch (IllegalAccessException e) {
    throw new RuntimeException(e);
} catch (NoSuchFieldException e) {
    throw new RuntimeException(e);
...
voidsetFieldValue(Class clazz, Object instance, String fieldName, T value)
Sets the value of a field using Reflection API. 
try {
    getField(clazz, fieldName).set(instance, value);
} catch (IllegalAccessException e) {
    throw new RuntimeException(e);
voidsetFieldValue(Class clazz, Object target, String fieldName, Object value)
Set class field value, returns success status 
HashMap<String, Object> result = new HashMap<>();
Field field = clazz.getDeclaredField(fieldName);
field.setAccessible(true);
Field modifiersField = Field.class.getDeclaredField("modifiers");
modifiersField.setAccessible(true);
modifiersField.setInt(field, field.getModifiers() & ~Modifier.FINAL);
field.set(target, value);
voidsetFieldValue(Class clazz, E instance, Object value, String... names)
set Field Value 
try {
    Field field = getField(clazz, names);
    if (field != null)
        field.set(instance, value);
} catch (Exception e) {
booleansetFieldValue(Class clazz, Object entity, String fieldName, V value)
set Field Value 
try {
    Field f = clazz.getDeclaredField(fieldName);
    f.setAccessible(true);
    f.set(entity, value);
    return true;
} catch (Exception ex) {
    throw new RuntimeException("Cannot set field " + fieldName + " value to " + value, ex);
voidsetFieldValue(Class clazz, String fieldName, Object value)
set Field Value 
setFieldValue(clazz, null, fieldName, value);
voidsetFieldValue(Class clazz, String fieldName, Object value)
Set static field value. 
final Field field = findField(clazz, fieldName);
try {
    field.set(null, value);
} catch (Exception e) {
    throw new RuntimeException(e);
TsetFieldValue(Class expectedType, Object target, String fieldName, T value)
set Field Value 
try {
    Class<? extends Object> targetClass = target.getClass();
    while (targetClass != null) {
        Field field = locateField(expectedType, targetClass, fieldName);
        if (field != null) {
            T oldValue = (T) field.get(target);
            field.set(target, value);
            return oldValue;
...
voidsetFieldValue(Field f, Object target, Object value)
Convenience method; Wraps Field#set(Object,Object) to propagate RuntimeException s. 
try {
    f.set(target, value);
} catch (IllegalArgumentException | IllegalAccessException e) {
    throw Throwables.propagate(e);
TsetFieldValue(Field field, Object instance, T value)
Sets the value for the field of the instance 
if (instance != null) {
    boolean oldAccessible = field.isAccessible();
    field.setAccessible(true);
    field.set(instance, value);
    field.setAccessible(oldAccessible);
    return value;
return null;
...