rspec/rules/S3020/java/rule.adoc

Given no arguments, the ``++Collections.toArray++`` method returns an ``++Object []++``, which will cause a ``++ClassCastException++`` at runtime if you try to cast it to an array of the proper class. Instead, pass an array of the correct type in to the call.


== Noncompliant Code Example

----
public String [] getStringArray(List<String> strings) {
  return (String []) strings.toArray();  // Noncompliant; ClassCastException thrown
}
----


== Compliant Solution

----
public String [] getStringArray(List<String> strings) {
  return strings.toArray(new String[0]);
}
----