private methods that don't access instance data can be static to prevent any misunderstanding about the contract of the method.
== Noncompliant Code Example
----
class Utilities {
private static String magicWord = "magic";
private String getMagicWord() { // Noncompliant
return magicWord;
}
private void setMagicWord(String value) { // Noncompliant
magicWord = value;
}
}
----
== Compliant Solution
----
class Utilities {
private static String magicWord = "magic";
private static String getMagicWord() {
return magicWord;
}
private static void setMagicWord(String value) {
magicWord = value;
}
}
----
== Exceptions
When java.io.Serializable is implemented the following three methods are excluded by the rule:
* private void writeObject(java.io.ObjectOutputStream out) throws IOException;
* private void readObject(java.io.ObjectInputStream in) throws IOException, ClassNotFoundException;
* private void readObjectNoData() throws ObjectStreamException;