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

ObjectnewInstance(String className, Object arg1)
new Instance 
Class[] argTypes = { arg1.getClass() };
Object[] args = { arg1 };
return newInstance(className, argTypes, args);
ObjectnewInstance(String className, Object... args)
new Instance 
return newInstance(Class.forName(className), args);
ObjectnewInstance(String className, Object... args)
new Instance 
Class<?> newoneClass = Class.forName(className);
return newInstance(newoneClass, args);
ObjectnewInstance(String className, Object... parameters)
new Instance 
try {
    Class<?> objClass = Class.forName(className);
    Constructor<?> constructor = getConstructor(objClass, parameters);
    if (constructor != null) {
        return constructor.newInstance(parameters);
} catch (Exception e) {
return null;
ObjectnewInstance(String className, Object... params)
Creates a new instance. 
Constructor<?> best = null;
int bestMatch = 0;
for (Constructor<?> c : Class.forName(className).getConstructors()) {
    int p = match(c.getParameterTypes(), params);
    if (p > bestMatch) {
        bestMatch = p;
        best = c;
if (best == null) {
    throw new NoSuchMethodException(className);
return best.newInstance(params);
ObjectnewInstance(String className, Object[] args)
new Instance 
Class newoneClass = Class.forName(className);
Class[] argsClass = new Class[args.length];
for (int i = 0, j = args.length; i < j; i++) {
    argsClass[i] = args[i].getClass();
Constructor cons = newoneClass.getConstructor(argsClass);
return cons.newInstance(args);
ObjectnewInstance(String className, Object[] args)
new Instance 
Class newoneClass = Class.forName(className);
Class[] argsClass = new Class[args.length];
for (int i = 0, j = args.length; i < j; i++) {
    argsClass[i] = args[i].getClass();
Constructor cons = newoneClass.getConstructor(argsClass);
return cons.newInstance(args);
ObjectnewInstance(String className, Object[] args)
new Instance 
try {
    Class newoneClass = Class.forName(className);
    Class[] argsClass = new Class[args.length];
    for (int i = 0, j = args.length; i < j; i++) {
        argsClass[i] = args[i].getClass();
    Constructor cons = newoneClass.getConstructor(argsClass);
    return cons.newInstance(args);
...
ObjectnewInstance(String classname, Properties properties)
Get a new instance of an object based on its classpath. 
Object result = null;
Class<?> theClass = null;
try {
    theClass = Class.forName(classname);
    final Constructor constructor = theClass.getConstructor(Class.forName("java.util.Properties"));
    result = constructor.newInstance(properties);
} catch (NoSuchMethodException e) {
    result = newInstance(theClass);
...
ObjectnewInstance(String clazz)
new Instance 
checkState(!Strings.isNullOrEmpty(clazz));
try {
    return Class.forName(clazz).newInstance();
} catch (Exception exception) {
    throw new RuntimeException(exception);