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

ConstructorgetConstructor(Class clazz, Class... argTypes)
get Constructor 
try {
    return clazz.getConstructor(argTypes);
} catch (NoSuchMethodException e) {
    throw new IllegalStateException(e);
ConstructorgetConstructor(Class clazz, Class[] argTypes)
get Constructor 
if (clazz == null || argTypes == null) {
    throw new IllegalArgumentException();
try {
    return clazz.getConstructor(argTypes);
} catch (NoSuchMethodException e) {
    return null;
ConstructorgetConstructor(Class clazz, Class[] parametersTypes)
Gets the constructor with specified parameter types. 
return clazz.getDeclaredConstructor(parametersTypes);
ConstructorgetConstructor(Class clazz, Class[] paramTypes)
get Constructor 
for (Constructor c : clazz.getConstructors()) {
    if (isAssignable(c.getParameterTypes(), paramTypes))
        return c;
return clazz.getConstructor(paramTypes);
ConstructorgetConstructor(Class clazz, Class[] paramTypes)
get Constructor 
return getConstructor(clazz, paramTypes, false);
ConstructorgetConstructor(Class cls, Class[] args)
get Constructor 
return getConstructor(cls, args, null);
ConstructorgetConstructor(Class clz, Class expectedTypes[])
get Constructor 
Constructor constructor = null;
try {
    Constructor constructors[] = clz.getConstructors();
    for (int i = 0; i < constructors.length; i++) {
        Constructor creator = constructors[i];
        if (isAssignable(expectedTypes, creator.getParameterTypes()))
            if (constructor == null)
                constructor = creator;
...
ConstructorgetConstructor(Class type, Class[] argTypes)
Returns a Constructor for the given method signature, or null if no such Constructor can be found. 
if (null == type || null == argTypes) {
    throw new NullPointerException();
Constructor ctor = null;
try {
    ctor = type.getConstructor(argTypes);
} catch (Exception e) {
    ctor = null;
...
ConstructorgetConstructor(Class c, Class[] args)
Answer the constructor of the class c which takes arguments of the type(s) in args, or null if there isn't one. 
try {
    return c.getConstructor(args);
} catch (NoSuchMethodException e) {
    return null;
ConstructorgetConstructor(Class clazz, boolean declared, Class... args)
get Constructor 
try {
    Constructor<?> constructor = null;
    if (declared) {
        constructor = clazz.getDeclaredConstructor(args);
        constructor.setAccessible(true);
    } else
        constructor = clazz.getConstructor(args);
    return constructor;
...