Avoid Calendar class use

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Metadata

ID: java-best-practices/avoid-calendar-creation

Language: Java

Severity: Warning

Category: Best Practices

Description

Creating instances of java.util.Calendar is expensive. Use alternatives that are less heavy and better in terms of performance.

Non-Compliant Code Examples

public class Main {
    public static void main(String[] args) {
        Date d = Calendar.getInstance().getTime();
        long ms = Calendar.getInstance().getTimeInMillis();
    }
}

Compliant Code Examples

public class Main {
    public static void main(String[] args) {
        Date d = new Date();
        long ms = System.currentTimeMillis();
    }
}

How to use this rule

1
2
rulesets:
  - java-best-practices     # Rules to enforce Java best practices.

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