# Remove Explicit Type Argument
# Properties
| Property | Value |
|---|---|
| Rule ID | DiamondOperator |
| First seen in jSparrow version | 1.0.0 |
| Minimum Java version | 7 |
| Remediation cost | 1 min |
| Links |
# Description
Since Java 7 the Diamond Operator (opens new window) (<>) can be used to simplify instance creation where generics are involved.
# Benefits
Applying this rule reduces clutter and improves readability.
# Code Changes
# Type arguments on new instance creations
Pre
Map<String, List<String>> myMap = new HashMap<String, List<String>>();
Post
Map<String, List<String>> myMap = new HashMap<>();
# Type arguments on method invocation parameters
Pre
// Requires Java 8
List<GenericSample> result = foo.genericMethod(new ArrayList<GenericSample>(), input);
Post
// Requires Java 8
List<GenericSample> result = foo.genericMethod(new ArrayList<>(), input);
Automatic Application of This Rule
The automatic application of this rule is supported in the following jSparrow version:
# Tags
Tags
1
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