# Replace Map::get by Map::getOrDefault

# Properties

Property Value
Rule ID MapGetOrDefault
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.

# Benefits

Makes the code more readable, by using Java 8 extensions of Map interface.

# Code Changes

Pre

String value = concurrentHashMap.get(key);
if(value == null) {
    value = defaultValue;
}

Post

String value = concurrentHashMap.getOrDefault(key, defaultValue);

# Limitations

The rule applies only on map implementations that do not allow null values, namely:

Automatic Application of This Rule

The automatic application of this rule is supported in the following jSparrow version:

# Tags

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