Java Utililty Methods Reflection Method Parameter

List of utility methods to do Reflection Method Parameter

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Description

The list of methods to do Reflection Method Parameter are organized into topic(s).

Method

OptionalgetMethod(Class type, String name, Class... parameterTypes)
get Method 
try {
    return Optional.of(type.getDeclaredMethod(name, parameterTypes));
} catch (NoSuchMethodException e) {
    return Optional.empty();
MethodgetMethod(Class clazz, String methodName, Class[] parameterTypes)
This method return the list of method of any class. 
Method method = null;
try {
    method = clazz.getMethod(methodName, parameterTypes);
} catch (NoSuchMethodException e) {
    if (methodName.startsWith("get")) {
        methodName = methodName.replaceFirst("get", "is");
    } else if (methodName.startsWith("is")) {
        methodName = methodName.replaceFirst("get", "is");
...
MethodgetMethod(final Class clazz, final String name, final Class... parameterTypes)
get Method 
if (clazz == null) {
    throw new NoSuchMethodException(name + "() method not found.");
try {
    return clazz.getDeclaredMethod(name, parameterTypes);
} catch (Exception ex) {
    return getMethod(clazz.getSuperclass(), name, parameterTypes);
MethodgetMethod(final Class javaClass, final String methodName, final Class[] methodParameterTypes, final boolean shouldSetAccessible)
Get a method declared in the given class. 
Method method = findMethod(javaClass, methodName, methodParameterTypes);
if (shouldSetAccessible) {
    method.setAccessible(true);
return method;
MethodgetMethod(final Class aClass, final String methodName, Class[] parameterTypes)
Warning : each call of this method should be tested with a JUnit test, in order to know when the API has changed 
Method m = null;
m = aClass.getDeclaredMethod(methodName, parameterTypes);
m.setAccessible(true);
return m;
MethodgetMethod(final Class clazz, final String methodName, final Class... parameterTypes)
get Method 
try {
    return clazz.getDeclaredMethod(methodName, parameterTypes);
} catch (final NoSuchMethodException ex) {
    return null;
MethodgetMethod(final Class clazz, final String name, final Class... parametertypes)
Get a method by name. 
Method result = null;
for (final Method method : getMethods(clazz)) {
    if (method.getName().equals(name) && Arrays.equals(method.getParameterTypes(), parametertypes)) {
        result = method;
        break;
if (result == null)
...
MethodgetMethod(final Class clazz, final String name, final Class... parameterTypes)
Returns the matched public method of the specified class or null if no such method 
try {
    return clazz.getMethod(name, parameterTypes);
} catch (final Exception e) {
    return null;
MethodgetMethod(final Class target, final String name, final Class... parameters)
Gets the method defined on the target class. 
final String key = target.getName() + '.' + name;
Method method = METHOD_CACHE.get(key);
if (method != null) {
    return method;
try {
    method = target.getMethod(name, parameters);
    METHOD_CACHE.put(key, method);
...
MethodgetMethod(final Class receiver, final String methodName, final Class... parameterTypes)
get Method 
try {
    return receiver.getMethod(methodName, parameterTypes);
} catch (NoSuchMethodException | SecurityException e) {
    throw new RuntimeException(e);