Do not use a string with only one character

Docs > Code Analysis > Static Analysis Rules > Do not use a string with only one character

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Metadata

ID: java-best-practices/indexof-char

Language: Java

Severity: Warning

Category: Performance

Description

When using indexOf with only one character, use a character and not a string as it executes faster.

Non-Compliant Code Examples

class Main {
    public static void main(String[] args) {
        int pos = s.indexOf("f"); 
    }
}

Compliant Code Examples

class Main {
    public static void main(String[] args) {
        int pos = s.indexOf('f'); 
    }
}

How to use this rule

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

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