Java Utililty Methods Class New Instance

Constructor constructor;
try {
    constructor = cls.getConstructor();
} catch (NoSuchMethodException e) {
    e.printStackTrace();
    return null;
if (!constructor.isAccessible())
...

Constructor<T> constr = cls.getConstructor((Class[]) null);
if (!constr.isAccessible()) {
    constr.setAccessible(true);
T result = constr.newInstance((Object[]) null);
return result;

Constructor<T> declaredConstructor = args.length == 0 ? getConstructor(cls) : getConstructor(cls, args);
boolean accessible = declaredConstructor.isAccessible();
if (accessible) {
    return declaredConstructor.newInstance(args);
} else {
    declaredConstructor.setAccessible(true);
    try {
        return declaredConstructor.newInstance(args);
...

try {
    Constructor<T> cnstr = clz.getDeclaredConstructor(argType);
    cnstr.setAccessible(true);
    return cnstr.newInstance(arg);
} catch (Exception e) {
    throw new RuntimeException(e);

return (T[]) Array.newInstance(componentType, size);

if (elementType.isPrimitive()) {
    throw new IllegalArgumentException("element type cannot be primitive: " + elementType);
@SuppressWarnings("unchecked")
T ret[] = (T[]) Array.newInstance(elementType, len);
return ret;

T t = null;
try {
    Constructor<T> constructor = klass.getDeclaredConstructor();
    if (constructor != null) {
        constructor.setAccessible(true);
        t = constructor.newInstance();
} catch (Exception e) {
...

T result;
try {
    Constructor<T> meth = (Constructor<T>) CONSTRUCTOR_CACHE.get(klass);
    if (meth == null) {
        meth = klass.getDeclaredConstructor(new Class[] {});
        meth.setAccessible(true);
        CONSTRUCTOR_CACHE.put(klass, meth);
    result = meth.newInstance();
} catch (Exception e) {
    throw new RuntimeException(e);
return result;

throw new RuntimeException("ReflectionHelper can't be used from web mode.");

try {
    return (T) klass.newInstance();
} catch (Exception e) {
    throw new IllegalArgumentException("instance class[" + klass.getName() + "] with ex:", e);