# Replace equals() on Enum Constants
# Properties
| Property | Value |
|---|---|
| Rule ID | EnumsWithoutEquals |
| First seen in jSparrow version | 2.2.0 |
| Minimum Java version | 5 |
| Remediation cost | 2 min |
# Description
Replaces occurrences of equals() on Enum constants with an identity comparison (==).
In the case the equals relation is wrapped with an boolean negation the result will be an not equals (!=).
# Benefits
Technically, equals and == are the same. == however is null safe and thus can help avoid programming errors.
# Code Changes
# Enum in right-hand-side
Pre
public boolean isRoundUp(RoundingMode roundingMode) {
return roundingMode.equals(RoundingMode.UP);
}
Post
public boolean isRoundUp(RoundingMode roundingMode) {
return roundingMode == RoundingMode.UP;
}
# Enum in left-hand-side
Pre
public boolean isRoundUp(RoundingMode roundingMode) {
return RoundingMode.UP.equals(roundingMode);
}
Post
public boolean isRoundUp(RoundingMode roundingMode) {
return RoundingMode.UP == roundingMode;
}
# Enum in infix expression
Pre
public boolean isRoundUp(RoundingMode roundingMode) {
return !RoundingMode.UP.equals(roundingMode);
}
Post
public boolean isRoundUp(RoundingMode roundingMode) {
return !(RoundingMode.UP == roundingMode);
}
Automatic Application of This Rule
The automatic application of this rule is supported in the following jSparrow versions:
# Tags
1
You & jSparrow
