Java Utililty Methods Assert Null

List of utility methods to do Assert Null

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Description

The list of methods to do Assert Null are organized into topic(s).

Method

voidassertAllAreNull(String messageIfNull, Object... objects)
Asserts that all of the objects are null. 
for (final Object object : objects) {
    if (object != null) {
        throw new IllegalArgumentException(messageIfNull);
voidassertInstance(final Object object, final Class c, final boolean allowNull)
Asserts the the given object is an instance of the given class -- optionally allowing the object to be null. 
if (object == null && allowNull) {
    return;
if (object == null || c == null) {
    throw new NullPointerException();
} else if (!c.isInstance(object)) {
    throw new IllegalArgumentException();
voidassertIsNull(Object obj)
Asserts that the passed entry is null 
if (obj != null) {
    throw new AssertionError(
            "Passed object: " + obj.getClass().getName() + " is not null while this was expected");
TassertNonNull(final T object, final String paramName)
Throws NullPointerException with message paramName if object is null. 
if (object == null) {
    throw new NullPointerException(paramName + " must not be null");
return object;
voidassertNonNull(String argumentName, Object argument)
assert Non Null 
if (argument == null)
    throw new IllegalArgumentException("Argument '" + argumentName + "' is null.");
voidassertNoNull(Object object, String paramName)
Assert that the given object parameter is not null. 
if (object == null) {
    throw new NullPointerException(paramName + " cannot be null.");
voidassertNull(final Object obj, final String msg)
assert Null 
if (null != obj) {
    throw new IllegalArgumentException(msg);
voidassertNull(final Object value, final String name)
Asserts that the parameter's value is null. 
if (value != null) {
    throw new IllegalArgumentException(PREFIX + name + " is not null.");
voidassertNull(Object o)
assert Null 
if (o != null) {
    throw new AssertionError("Not null.");
voidassertNull(Object obj)
assert Null 
if (obj != null) {
    throw new IllegalArgumentException();