Java Utililty Methods Reflection Method Setter Get

return m.getParameterTypes()[0];

String methodName = method.getName();
if (methodName.startsWith("set")) {
    return getFieldName(methodName.substring(3));
throw new IllegalArgumentException("Invalid setter method" + method.getName());

for (int i = 0; i < methods.length; i++) {
    Method method = methods[i];
    if (method.getName().startsWith("set")) {
        if (method.getName().substring(1).equals(getter.getName().substring(1))) {
            return method;
return null;

List<Method> methods = setterCache.get(clazz);
if (methods == null) {
    methods = new ArrayList<>();
    for (Method method : clazz.getDeclaredMethods()) {
        String name = method.getName();
        if (name.startsWith("set") && method.getParameterTypes().length == 1 && name.length() > 3) {
            methods.add(method);
    setterCache.put(clazz, methods);
return methods;

TreeMap map = new TreeMap();
Method methods[] = getAllSetters(cls);
String memberName;
for (int i = 0; i < methods.length; i++) {
    memberName = methods[i].getName();
    memberName = memberName.substring(3);
    map.put(memberName, methods[i]);
return map;

for (Class clazz : supportedTypes) {
    try {
        Class[] argList = new Class[1];
        argList[0] = clazz;
        return beanClass.getMethod("set" + fieldName, argList);
    } catch (NoSuchMethodException nsme) {
return null;

Method result = null;
Method[] methods = c.getMethods();
for (Method m : methods) {
    String name = m.getName();
    if (name.equalsIgnoreCase(methodName)) {
        Class[] params = m.getParameterTypes();
        if (params.length == 1 && PRIMITIVES.contains(params[0])) {
            result = m;
...

String setterName = PROPERTY_MUTATOR_PREFIX + (propertyName.isEmpty() ? ""
        : propertyName.substring(0, 1).toUpperCase() + propertyName.substring(1));
try {
    return containingClass.getMethod(setterName, propertyType);
} catch (NoSuchMethodException e) {
    return null;

String setterName = getEtterMethodName(property, "set");
Method setterMethod = null;
Method[] methods = type.getMethods();
for (int i = 0; i < methods.length; i++) {
    Method method = methods[i];
    if (method.getName().equals(setterName)) {
        if (setterMethod != null)
            throw new IllegalStateException(String.format(
...

Method getter = getGetterMethod(beanClass, property);
if (getter == null)
    return null;
else
    return getSetterMethod(beanClass, property, getter.getReturnType());