Java Utililty Methods Method Call

Class<?>[] parameterTypes = new Class<?>[parameters.length];
for (int i = 0; i < parameters.length; i++) {
    parameterTypes[i] = parameters[i] == null ? Object.class : parameters[i].getClass();
Method method = object.getClass().getDeclaredMethod(methodName, parameterTypes);
method.setAccessible(true);
return returnType.cast(method.invoke(object, parameters));

if (object == null) {
    throw new NullPointerException();
Method method = getMatchingMethod(object.getClass(), methodName, args);
return method.invoke(object, args);

Method m = classToInvoke.getDeclaredMethod(method, argumentClasses);
Object o;
if (m.isAccessible())
    o = m.invoke(objToInvoke, arguments);
else {
    m.setAccessible(true);
    o = m.invoke(objToInvoke, arguments);
    m.setAccessible(false);
...

Method m;
try {
    m = owner.getClass().getDeclaredMethod(methodName);
} catch (NoSuchMethodException e) {
    throw new RuntimeException(e);
m.setAccessible(true);
try {
...

return method.invoke(proxy, args);

if (source instanceof Map) {
    return valueOfMap((Map) source, key);
} else {
    return valueOfObj(source, key);

try {
    Method method = null;
    try {
        method = clazz.getMethod(methodName, parameterTypes);
    } catch (NoSuchMethodException e) {
        method = clazz.getDeclaredMethod(methodName, parameterTypes);
    method.setAccessible(true);
...

try {
    Method m = target.getClass().getMethod(method);
    return clazz.cast(m.invoke(target));
} catch (Throwable t) {
    throw new RuntimeException(t);

requireNonNull(target, "target is null");
requireNonNull(method, "method is null");
try {
    return method.invoke(target);
} catch (InvocationTargetException e) {
    Throwable targetException = e.getTargetException();
    if (targetException instanceof RuntimeException) {
        throw new MBeanException((RuntimeException) targetException,
...

return invoke(target, methodName, NO_ARGS);