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

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

Class Name

Comparison to Class Names (Java)

Significance

reliability

Mnemonic

JAVA.COMPARE.EQUALS.CN

Categories

CWE	CWE:486	Comparison of Classes by Name

Availability

Available for Java only.

Enabling

Checks for this warning class are enabled by default. To disable them, add the following WARNING_FILTER rule to the project configuration file.

WARNING_FILTER += discard class="Comparison to Class Names (Java)"

// 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
            // ... 
    }
}

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

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

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

Summary

Properties

Example

Resolution

Relevant Configuration File Parameters