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);