40 lines
1.1 KiB
Plaintext
40 lines
1.1 KiB
Plaintext
== Why is this an issue?
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Since the introduction of generics in Java 5, the use of generic types such as ``++List<String>++`` is recommended over the use of raw ones such as ``++List++``. Assigning a raw type to a generic one is not type safe, and will generate a warning. The old ``++EMPTY_...++`` fields of the ``++Collections++`` class return raw types, whereas the newer ``++empty...()++`` methods return generic ones.
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=== Noncompliant code example
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[source,java]
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----
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List<String> collection1 = Collections.EMPTY_LIST; // Noncompliant
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Map<String, String> collection2 = Collections.EMPTY_MAP; // Noncompliant
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Set<String> collection3 = Collections.EMPTY_SET; // Noncompliant
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----
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=== Compliant solution
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[source,java]
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----
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List<String> collection1 = Collections.emptyList();
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Map<String, String> collection2 = Collections.emptyMap();
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Set<String> collection3 = Collections.emptySet();
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----
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ifdef::env-github,rspecator-view[]
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'''
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== Implementation Specification
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(visible only on this page)
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include::message.adoc[]
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'''
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== Comments And Links
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(visible only on this page)
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include::comments-and-links.adoc[]
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endif::env-github,rspecator-view[]
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