SEI CERT Oracle Coding Standard for Java

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Noncompliant Code Example

Flagged

Checker

Message

Boolean lock object

Yes

DL_SYNCHRONIZATION_ON_BOOLEAN

Synchronization on Boolean could deadlock

Boxed primitive

Yes

DL_SYNCHRONIZATION_ON_BOXED_PRIMITIVE

Synchronization on Integer could deadlock

interned String object

No

n/a

n/a

String literal

Yes

DL_SYNCHRONIZATION_ON_SHARED_CONSTANT

Synchronization on interned String could deadlock

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