Java Utililty Methods Reflection Constructor Invoke

List of utility methods to do Reflection Constructor Invoke

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Description

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

Method

TinvokeConstructor(Constructor constructor, Object... parameters)
invoke Constructor 
try {
    return constructor.newInstance(parameters);
} catch (InstantiationException | IllegalAccessException | InvocationTargetException ex) {
    throw new IllegalStateException(ex);
TinvokeConstructor(final Class clazz, final Class[] paramTypes, final Object... args)
Invokes a constructor. 
assert paramTypes.length == args.length;
@Nullable
T obj = null;
try {
    if (paramTypes.length > 0) {
        final Constructor<T> constructor = clazz.getConstructor(paramTypes);
        obj = constructor.newInstance(args);
    } else {
...
ObjectinvokeConstructor(final Constructor constructor, final Object... args)
Invoke the specified Constructor with the supplied arguments. 
if (constructor == null) {
    throw new IllegalArgumentException("Constructor must not be null.");
constructor.setAccessible(true);
return constructor.newInstance(args);
ObjectinvokeConstructor(final Constructor constructor, final Object[] args)
Construct an object with the given Constructor and the given array of arguments. 
return constructor.newInstance(args);
TinvokeConstructor(final Constructor constructor, final Object... args)
invoke Constructor 
try {
    final T object = constructor.newInstance(args);
    return object;
} catch (final RuntimeException e) {
    throw e;
} catch (final Error e) {
    throw e;
} catch (final InvocationTargetException e) {
...
ObjectinvokeConstructor(String className, Class[] paramTypes, Object[] paramValues)
Invokes constructor in class by given className , paramTypes and paramValues . 
Class<?> clazz = Class.forName(className);
Constructor<?> constructor = clazz.getConstructor(paramTypes);
return constructor.newInstance(paramValues);
ObjectinvokeConstructor(String className, Object... arguments)
Returns an instantiation of the class specified by the input String using the arguments provided. 
try {
    Class<?> cls = Class.forName(className);
    Class<?>[] parameterTypes = new Class<?>[arguments.length];
    int i = 0;
    for (Object argument : arguments)
        parameterTypes[i++] = argument.getClass();
    Constructor<?> constructor = cls.getConstructor(parameterTypes);
    if (!constructor.isAccessible())
...
TinvokeConstructorOrFail(Constructor constructor, Object... args)
Invokes the given constructor with optional arguments args , returning the new instance created by constructor . 
try {
    return constructor.newInstance(args);
} catch (InvocationTargetException e) {
    throw new RuntimeException("Failed to call constructor '"
            + constructor.getDeclaringClass().getSimpleName() + "': " + e.getCause().getMessage(),
            e.getCause());
} catch (Exception e) {
    throw new RuntimeException("Failed to call constructor '"
...
ObjectinvokeCtor(Constructor ctor, String str)
invoke Ctor 
try {
    return ctor.newInstance(new Object[] { str });
} catch (Throwable t) {
    return null;
ObjectinvokeExactConstructor(Class klass, Object arg)

Convenience method returning new instance of klazz using a single argument constructor. 

Object[] args = { arg };
return invokeExactConstructor(klass, args);