# Remove Explicit Type Argument

# Properties

# Description

Since Java 7 the Diamond Operator (<>) can be used to simplify instance creation where generics are involved.

# Benefits

Applying this rule reduces clutter and improves readability.

# Requirement & Tags

# 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);