Java Utililty Methods Class New Instance

List of utility methods to do Class New Instance

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Description

The list of methods to do Class New Instance are organized into topic(s).

Method

TnewInstance(Class clazz)
new Instance 
Constructor<T> publicConstructor;
try {
    publicConstructor = clazz.getConstructor();
} catch (NoSuchMethodException e) {
    try {
        Constructor<T> privateConstructor = clazz.getDeclaredConstructor();
        privateConstructor.setAccessible(true);
        return privateConstructor.newInstance();
...
TnewInstance(Class clazz)
new Instance 
try {
    return clazz.newInstance();
} catch (Exception e) {
    throw new RuntimeException("could not instantiate class " + clazz.getName(), e);
TnewInstance(Class clazz)
Creates a new instance from the same type as the given Class. 
return clazz.newInstance();
TnewInstance(Class clazz)
new Instance 
T result;
try {
    @SuppressWarnings("unchecked")
    Constructor<T> meth = (Constructor<T>) CONSTRUCTOR_CACHE.get(clazz);
    if (meth == null) {
        meth = clazz.getDeclaredConstructor(EMPTY_CLASS_ARRAY);
        meth.setAccessible(true);
        CONSTRUCTOR_CACHE.put(clazz, meth);
...
TnewInstance(Class clazz)
new Instance 
try {
    return (T) clazz.newInstance();
} catch (Exception e) {
    throw new RuntimeException("Instance class " + clazz + " error!");
TnewInstance(Class clazz)
Constructs a new instance of the class using the no-arg constructor. 
Constructor<T> cons = getConstructor(clazz);
return cons.newInstance(EMPTY_OBJECT_ARRAY);
TnewInstance(Class clazz)
Create an object for the given class using its default constructor. 
return newInstance(clazz, EMPTY_CLASSES);
TnewInstance(Class clazz)
new Instance 
Constructor<T> ctor = null;
try {
    ctor = clazz.getDeclaredConstructor(new Class<?>[0]);
    ctor.setAccessible(true);
    T o = ctor.newInstance(new Object[0]);
    return o;
} catch (Throwable t) {
    return null;
...
TnewInstance(Class clazz, Class[] argumentTypes, Object[] arguments)
new Instance 
if (argumentTypes == null || argumentTypes.length < 1) {
    return newDefaultInstance(clazz);
try {
    Constructor<T> ctr = clazz.getDeclaredConstructor(argumentTypes);
    ctr.setAccessible(true);
    return ctr.newInstance(arguments);
} catch (Exception e) {
...
TnewInstance(Class clazz, Class[] parameterTypes, Object[] initargs)
new Instance 
try {
    Constructor<T> c = clazz.getDeclaredConstructor(parameterTypes);
    c.setAccessible(true);
    return c.newInstance(initargs);
} catch (SecurityException e) {
    throw new RuntimeException(e);
} catch (NoSuchMethodException e) {
    throw new RuntimeException(e);
...