Java Utililty Methods Reflection Method Get from Object

List of utility methods to do Reflection Method Get from Object

Description

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

Method

MethodgetMethod(Class aObject, String aMethod, Class... aParameterTypes)
get Method
Method rMethod = null;
try {
    rMethod = aObject.getMethod(aMethod, aParameterTypes);
    rMethod.setAccessible(true);
} catch (Throwable e) {
return rMethod;
MethodgetMethod(Class c, String methodName, Object... pa)
Returns Method by name and parameter value
Method[] ma = c.getMethods();
for (Method m : ma) {
    if (!m.getName().equals(methodName)) {
        continue;
    Class[] pts = m.getParameterTypes();
    boolean shouldContinue = false;
    int len = pts.length;
...
MethodgetMethod(Class objectClass, String methodName, String argumentType)
get Method
Method returnMethod = null;
Method[] methods = objectClass.getMethods();
int size = methods.length;
for (int i = 0; i < size; i++) {
    Method method = methods[i];
    if (method.getName().equals(methodName)) {
        Class[] args = method.getParameterTypes();
        int argsize = args.length;
...
MethodgetMethod(Class type, String name, Object[] args)
Helper to return a method given its name and a list of arguments
boolean containsNull = false;
Class<?>[] types = null;
if (args == null)
    types = new Class[] {};
else {
    types = new Class[args.length];
    for (int i = 0; i < args.length; ++i) {
        if (args[i] != null)
...
MethodgetMethod(Class clz, String methodName, Class[] methodArgs)
Gets method from class clz or any of its superclasses.
if (clz == null)
    throw new NoSuchMethodException(methodName + "(" + methodArgs + ") method does not exist ");
try {
    return clz.getDeclaredMethod(methodName, methodArgs);
} catch (NoSuchMethodException e) {
    return getMethod(clz.getSuperclass(), methodName, methodArgs);
MethodgetMethod(Class type, String name, Class... parameterTypes)
get Method
try {
    return type.getMethod(name, parameterTypes);
} catch (NoSuchMethodException | SecurityException e) {
    throw new RuntimeException("Failed to get method from class. methodName=" + name + " class=" + type, e);
MethodgetMethod(Class cls, String method, Object[] params)
Get the method based on its name
Class<?>[] classes = new Class[params.length];
for (int i = 0; i < params.length; i++) {
    classes[i] = params[i].getClass();
return cls.getMethod(method, classes);
MethodgetMethod(Class clz, String methodName, Object... params)
Get a non-public (i.e.
if (params == null) {
    return clz.getMethod(methodName);
} else {
    int i = 0;
    Class<?>[] paramClasses = new Class<?>[params.length];
    for (Object param : params) {
        paramClasses[i++] = param.getClass();
    return clz.getDeclaredMethod(methodName, paramClasses);
MethodgetMethod(Class klass, String methodName, Object... params)
get Method
Class<?>[] classes = (params.length != 0) ? new Class<?>[params.length] : EMPTY_CLASS_PARAMS;
for (int i = 0; i < params.length; i++) {
    classes[i] = params[i].getClass();
return klass.getMethod(methodName, classes);
MethodgetMethod(Class objectType, String methodName, Class... parameterTypes)
Returns the method on the objectType with the given name and given parameter types.
try {
    Method method = objectType.getDeclaredMethod(methodName, parameterTypes);
    if (method == null) {
        method = objectType.getMethod(methodName, parameterTypes);
    return method;
} catch (Exception e) {
    return null;
...