Java Utililty Methods Reflection Constructor Get

for (Constructor<?> c : clazz.getDeclaredConstructors())
    if (args.length == 0 && c.getParameterTypes().length == 0
            || ClassListEqual(args, c.getParameterTypes())) {
        c.setAccessible(true);
        return c;
for (Constructor<?> c : clazz.getConstructors())
    if (args.length == 0 && c.getParameterTypes().length == 0
...

try {
    Constructor<?> ctor = clazz.getDeclaredConstructor(args);
    ctor.setAccessible(true);
    return MethodHandles.lookup().unreflectConstructor(ctor);
} catch (NoSuchMethodException e) {
    throw new IllegalStateException(
            clazz.getName() + " has no constructor with args " + Arrays.toString(args), e);
} catch (IllegalAccessException e) {
...

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

try {
    return clazz.getConstructor(parameterTypes);
} catch (NoSuchMethodException e) {
} catch (SecurityException e) {
return null;

try {
    return clazz.getConstructor(params);
} catch (NoSuchMethodException e) {
    return null;

if (clazz == null) {
    System.err.println("No class specified.");
    return null;
Constructor<?> constructor = null;
try {
    constructor = clazz.getDeclaredConstructor(params);
} catch (NoSuchMethodException nsme) {
...

Constructor<?> constructor = null;
int length = args.length;
Class<?>[] classes = new Class<?>[length];
for (int i = 0; i < length; i++) {
    Object object = args[i];
    classes[i] = object.getClass();
constructor = clazz.getConstructor(classes);
...

Class<?>[] parameterClasses = new Class<?>[parameters.length];
for (int i = 0; i < parameters.length; i++) {
    parameterClasses[i] = parameters[i] == null ? null : parameters[i].getClass();
return clazz.getConstructor(parameterClasses);

Constructor<?>[] consarr = cls.getDeclaredConstructors();
for (int i = 0; i < consarr.length; i++) {
    Class<?>[] paramtypes = consarr[i].getParameterTypes();
    if (java.util.Arrays.equals(signature, paramtypes))
        return consarr[i];
return null;

Constructor<?> constructor = null;
for (Constructor<?> classMethod : cls.getConstructors()) {
    Class<?>[] parametersType = classMethod.getParameterTypes();
    boolean match = false;
    if (parametersType.length == parameters.length) {
        match = true;
        for (int i = 0, length = parametersType.length; i < length; i++) {
            if (parameters[i] != null) {
...