Through Java’s evolution keywords have been added. While code that uses those words as identifiers may be compilable under older versions of Java,
it will not be under modern versions.
Following keywords are marked as invalid identifiers
| Keyword |
Added |
_
|
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.
Noncompliant Code Example
public void doSomething() {
int enum = 42; // Noncompliant
String _ = ""; // Noncompliant
}
Compliant Solution
public void doSomething() {
int magic = 42;
}
