Replace Map::get by Map::getOrDefault
Properties
| Property | Value |
|---|---|
| First seen in jSparrow version | 3.5.0 |
| Minimum Java version | 8 |
| Remediation cost | 2 min |
Description
Java 8 introduced Map::getOrDefault which offers the possibility to return a default value if the map does not contain a mapping for the given key.
This rule replaces the invocations of Map::get followed by a null-check with Map::getOrDefault.
Warning
The rule applies only on map implementations that do not allow null values, namely:
Benefits
Makes the code more readable, by using Java 8 extensions of Map interface.
Requirement & Tags
Requirements
Java 8
Code Changes
Pre
String value = concurrentHashMap.get(key);
if(value == null) {
value = defaultValue;
}
Post
String value = concurrentHashMap.getOrDefault(key, defaultValue);
Automatic Application of This Rule
The automatic application of this rule is supported in the following jSparrow version: