Java Utililty Methods Reflection Constructor Get

for (final Constructor<?> candidate : clazz.getConstructors()) {
    if (Arrays.equals(paramTypes, candidate.getParameterTypes())) {
        return candidate;
return null;

final Constructor<E> constructor;
final String classID = valueClass.getName();
try {
    constructor = valueClass.getDeclaredConstructor(parameter);
} catch (final NoSuchMethodException e) {
    throw new IllegalArgumentException(classID + " does not have a constructor "
            + valueClass.getSimpleName() + '(' + getName(parameter) + ')', e);
constructor.setAccessible(true);
return constructor;

final Constructor<T> result = clazz.getDeclaredConstructor(parametertypes);
return result;

try {
    return clazz.getConstructor(parameterTypes);
} catch (final Exception e) {
    return null;

final Constructor<T> constructor = getStrictConstructor(clazz, constructorArgs);
return constructor == null ? findCompatibleConstructor(clazz, constructorArgs) : constructor;

Constructor<T> ret = null;
for (final Constructor<?> classConstructor : clazz.getDeclaredConstructors()) {
    if (isMatchingConstructor(classConstructor, objs)) {
        if (ret != null) {
            throw new IllegalArgumentException(
                    "Ambiguity in the constructors for " + clazz.getName() + ".");
        ret = (Constructor<T>) classConstructor;
...

final int hashCode = instantiableClass.hashCode() ^ Arrays.hashCode(classes);
if (constructorCache.containsKey(hashCode)) {
    return (Constructor<T>) constructorCache.get(hashCode);
} else {
    if (!constructorsCache.containsKey(instantiableClass)) {
        constructorsCache.put(instantiableClass, instantiableClass.getDeclaredConstructors());
    boolean mismatch;
...

return ((Class<? extends T>) Class.forName(className)).getConstructor(argClasses);

try {
    Class<?> c = Class.forName(cls_name);
    return c.getConstructor(param_cls);
} catch (Exception e) {
    return null;

try {
    Class clazz = Class.forName(string);
    Constructor constructor = clazz.getDeclaredConstructor(types);
    constructor.setAccessible(true);
    return constructor;
} catch (Exception ex) {
return null;
...