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Replace String.format with concatenation in CorrelationIdFormatter #46467

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Replace String.format with concatenation in CorrelationIdFormatter #46467

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2 changes: 1 addition & 1 deletion core/spring-boot/src/main/java/org/springframework/boot/logging/CorrelationIdFormatter.java
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Original file line number Diff line number Diff line change
Expand Up @@ -76,7 +76,7 @@ public final class CorrelationIdFormatter {

private CorrelationIdFormatter(List<Part> parts) {
this.parts = parts;
this.blank = String.format("[%s] ", parts.stream().map(Part::blank).collect(Collectors.joining(" ")));
this.blank = "[" + parts.stream().map(Part::blank).collect(Collectors.joining(" ")) + "] ";
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@kzander91 kzander91 Jul 20, 2025 •
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Why don't we at this point just use the Collectors.joining() variant with a prefix and suffix?

Suggested change
this.blank = "[" + parts.stream().map(Part::blank).collect(Collectors.joining(" ")) + "] ";
this.blank = parts.stream().map(Part::blank).collect(Collectors.joining(" ", "[", "] "));

}

/**
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