JAVA.COMPARE.EQUALS.CN : Comparison to Class Names (Java)

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JAVA.COMPARE.EQUALS.CN : Comparison to Class Names (Java)

Summary

Class names are compared with equals(). This is not a reliable check for class equality, because multiple classes might have the same name.

Properties

Example

// Main.java
public class Main {
 
    public static void main(String[] args) {
        String s = "";
        Object o = "";
        if(o.getClass().getSimpleName().equals(s.getClass().getSimpleName())) // 'Comparison to Class Names (Java)' warning issued here
            // ... 
    }
}

Resolution

To check if two objects have the same class, use the getClass() method and the == operator.

Relevant Configuration File Parameters

The following configuration file parameters affect checks for this warning class.