Java Utililty Methods Reflection Constructor Get

List of utility methods to do Reflection Constructor Get

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Description

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

Method

StringgetConstructorSimpleName(Constructor constructor)
get Constructor Simple Name 
final String name = constructor.getName();
return getConstructorSimpleName(name);
ListgetConstructorsOfLength(final Class clazz, final int length)
get Constructors Of Length 
List<Constructor> fixedLengthConstructors = new ArrayList<Constructor>(1);
Constructor[] constructors = clazz.getDeclaredConstructors();
for (int i = 0; i < constructors.length; i++) {
    if (!Modifier.isPublic(constructors[i].getModifiers()))
        continue;
    Class[] parameterTypes = constructors[i].getParameterTypes();
    if (parameterTypes.length == length)
        fixedLengthConstructors.add(constructors[i]);
...
ConstructorgetConstructorWithArgs(Class clazz, Object... args)
Looks for a constructor matching the argument given. 
if (clazz != null) {
    Constructor<?>[] constructors = clazz.getConstructors();
    for (Constructor<?> constructor : constructors) {
        if (constructor.getParameterTypes().length == args.length) {
            Class<?>[] pType = constructor.getParameterTypes();
            for (int i = 0; i < pType.length; i++) {
                if (!pType[i].equals(args[i].getClass())) {
                    continue;
...
ConstructorgetConstructorWithLeastParametersFromList( ArrayList constructorsFromType)
get Constructor With Least Parameters From List 
Constructor planBConstructor = Object.class.getDeclaredConstructors()[0];
Constructor retVal;
if (!constructorsFromType.isEmpty()) {
    int index = 0;
    retVal = constructorsFromType.get(index);
    index++;
    while (retVal.getExceptionTypes().length > 0 && index < constructorsFromType.size()) {
        retVal = constructorsFromType.get(index);
...
ConstructorgetConstructorWithNoParams(Class clazz)
get Constructor With No Params 
for (Constructor constructor : clazz.getConstructors()) {
    if (constructor.getParameterTypes().length == 0) {
        if (Modifier.isPrivate(constructor.getModifiers())
                || Modifier.isProtected(constructor.getModifiers())) {
            constructor.setAccessible(true);
        return constructor;
return null;
ConstructorgetConstructorWithReflection(String className, Class... parameterTypes)
get Constructor With Reflection 
Class loadedClass = Class.forName(className);
return loadedClass.getConstructor(parameterTypes);