Java Utililty Methods Reflection Method Name

List of utility methods to do Reflection Method Name

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Description

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

Method

MethodgetMethodByName(Class clazz, String methodName)
get Method By Name 
for (Method m : clazz.getMethods()) {
    if (m.getName().equals(methodName)) {
        return m;
throw new IllegalStateException(
        "Expected '" + methodName + "' method not found on interface '" + clazz.getName());
MethodgetMethodByName(Class aClass, String methodName, Class... params)
Retrieves a method by name (grabs the first if overloaded). 
Method result = null;
try {
    result = aClass.getMethod(methodName, params);
} catch (Exception e) {
return (result);
MethodgetMethodByName(Class clazz, String methodName)
get Method By Name 
Method[] methods = clazz.getDeclaredMethods();
if (methods == null || methods.length == 0) {
    return null;
if (methodName == null || methodName.length() == 0) {
    return null;
List<Method> methodList = new ArrayList<Method>();
...
MethodgetMethodByName(Class clazz, String methodName)
get Method By Name 
List<Method> methodsFound = new ArrayList<Method>();
for (Method method : clazz.getMethods()) {
    if (method.getName().equals(methodName)) {
        methodsFound.add(method);
if (methodsFound.size() == 1) {
    return methodsFound.get(0);
...
MethodgetMethodByName(Class clazz, String name)
get Method By Name 
Method method = getPublicMethodByName(clazz, name);
if (method != null)
    return method;
method = getProtectedMethodByName(clazz, name);
if (method != null)
    return method;
return null;
MethodgetMethodByName(Class cls, String methodName)
Find that one method. 
List<Method> methods = getMethodsByName(cls, methodName);
if (methods.size() == 0) {
    throw new NoSuchMethodException(methodName + " on " + cls);
if (methods.size() > 1) {
    throw new RuntimeException("Doh! Too many methods named " + methodName + " on " + cls);
return methods.get(0);
...
MethodgetMethodByName(Class type, String methodName)
Searches for a public method in the specified class or its superclasses and -interfaces that matches the specified name and has no parameters. 
try {
    return type.getMethod(methodName);
} catch (NoSuchMethodException e) {
    return null;
MethodgetMethodByName(final Class cls, final String action)
Return the method that exactly match the action name. 
for (final Method m : cls.getMethods()) {
    if (m.getName().equals(action)) {
        return m;
throw new NoSuchMethodException(action);
MethodgetMethodByNameFromArray(Method[] methods, String methodName)
get Method By Name From Array 
Method method = null;
if (methods != null && methods.length > 0) {
    for (Method m : methods) {
        if (methodName.equalsIgnoreCase(m.getName())) {
            System.out.println("getMethodByNameFromArray: Found method " + methodName);
            return m;
return method;
MethodgetMethodByNameSimple(Class clz, String methodName)
get Method By Name Simple 
Method[] methods = clz.getDeclaredMethods();
for (Method method : methods) {
    if (method.getName().equals(methodName)) {
        return method;
return null;