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このルールを試す ID: java-best-practices/sb-append-char
Language: Java
Severity: Warning
Category: Best Practices
Description Do not append a string with single character to a StringBuffer
. Instead, append a character type. This is better practice and results in better performance. While this is negligible if the operation occurs once, it has performance impact if done at scale.
Learn More Non-Compliant Code Examples public class Main {
public static void main ( String [] args ){
StringBuffer sb = new StringBuffer ();
sb . append ( "a" );
sb . append ( "abc" );
while ( true ) {
sb . append ( "a" );
}
for ( Element e : elements ) {
sb . append ( "a" );
}
if ( true ) {
sb . append ( "a" );
} else {
sb . append ( "a" );
}
}
}
Compliant Code Examples public class Main {
public static void main ( String [] args ){
StringBuffer sb = new StringBuffer ();
sb . append ( 'a' );
sb . append ( "<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 1.0//EN\" " );
}
}
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