Java Utililty Methods Reflection Method Signature

String genericString = method.toGenericString();
String declaringClassName = method.getDeclaringClass().getName();
int a = genericString.indexOf(" " + declaringClassName + ".");
int b = genericString.lastIndexOf(')');
return genericString.substring(a + declaringClassName.length() + 2, b + 1);

StringBuilder sb = new StringBuilder();
sb.append(method.getName());
sb.append('(');
boolean firstParameter = true;
for (Class<?> parameterType : method.getParameterTypes()) {
    if (!firstParameter) {
        sb.append(',');
    firstParameter = false;
    sb.append(getClassName(parameterType));
sb.append(')');
return sb.toString();

StringBuilder sb = new StringBuilder();
if (method.getReturnType() != null) {
    sb.append(method.getReturnType().getName()).append("#");
sb.append(method.getName());
Class<?>[] parameterTypes = method.getParameterTypes();
if (parameterTypes != null) {
    for (int i = 0, length = parameterTypes.length; i < length; i++) {
...

return getSignature(method, true);

Method resultMethod = null;
Method[] allMethods = clazz.getDeclaredMethods();
if (params == null) {
    params = new Class[0];
for (Method method : allMethods) {
    if (method.getName().equals(methodName)) {
        Class<?> methodParams[] = method.getParameterTypes();
...