Why is this an issue?
Programming languages evolve over time, and new versions of Java introduce additional keywords. If future keywords are used in the current code, it
can create compatibility issues when transitioning to newer versions of Java. The code may fail to compile or behave unexpectedly due to conflicts
with newly introduced keywords.
The following keywords are marked as invalid identifiers:
| Keyword |
Added in version |
_
|
9 |
enum
|
5.0 |
assert and strictfp are another example of valid identifiers which became keywords in later versions, but are not
supported by this rule.
How to fix it
Rename the identifiers that use Java keywords.
Code examples
Noncompliant code example
public class MyClass {
int enum = 42; // Noncompliant
String _ = ""; // Noncompliant
}
Compliant solution
public class MyClass {
int magic = 42; // Noncompliant
String s = ""; // Noncompliant
}
Resources
Documentation
