The documentation for Class#newInstance
includes the following
warning:
Note that this method propagates any exception thrown by the nullary constructor, including a checked exception. Use of this method effectively bypasses the compile-time exception checking that would otherwise be performed by the compiler. The
Constructor.newInstance
method avoids this problem by wrapping any exception thrown by the constructor in a (checked)InvocationTargetException
.
Always prefer myClass.getConstructor().newInstance()
to calling
myClass.newInstance()
directly. The Class#newInstance
method is slated for
deprecation in JDK 9.
Note that migrating to Class#getConstructor()
and Constructor#newInstance
requires handling three new exceptions: IllegalArgumentException
,
NoSuchMethodException
, and InvocationTargetException
.
Suppress false positives by adding the suppression annotation @SuppressWarnings("ClassNewInstance")
to the enclosing element.