common/src/main/java/com/github/freeacs/common/util/TimestampMap.java
Make "sdf" an instance variable. Open
Open
private static final SimpleDateFormat sdf = new SimpleDateFormat("HH:mm:ss.SSS");
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- Exclude checks
Not all classes in the standard Java library were written to be thread-safe. Using them in a multi-threaded manner is highly likely to cause data problems or exceptions at runtime.
This rule raises an issue when an instance of Calendar
, DateFormat
, javax.xml.xpath.XPath
, or
javax.xml.validation.SchemaFactory
is marked static
.
Noncompliant Code Example
public class MyClass { private static SimpleDateFormat format = new SimpleDateFormat("HH-mm-ss"); // Noncompliant private static Calendar calendar = Calendar.getInstance(); // Noncompliant
Compliant Solution
public class MyClass { private SimpleDateFormat format = new SimpleDateFormat("HH-mm-ss"); private Calendar calendar = Calendar.getInstance();