Non-constant 'String' can be replaced with 'StringBuilder'
Reports variables declared as java.lang.String
that are repeatedly appended to. Such variables could be declared more efficiently as java.lang.StringBuffer
or java.lang.StringBuilder
.
Example:
String s = "";
for (int i = 0; i < names.length; i++) {
String name = names[i] + (i == names.length - 1 ? "" : " ");
s = s + name;
}
Such a loop can be replaced with:
StringBuilder s = new StringBuilder();
for (int i = 0; i < names.length; i++) {
String name = names[i] + (i == names.length - 1 ? "" : " ");
s.append(name);
}
Or even with:
String s = String.join(" ", names);
- By ID
Can be used to locate inspection in e.g. Qodana configuration files, where you can quickly enable or disable it, or adjust its settings.
NonConstantStringShouldBeStringBuffer
Use the option to make this inspection only report when the variable is appended to in a loop.
Here you can find the description of settings available for the Non-constant 'String' can be replaced with 'StringBuilder' inspection, and the reference of their default values.
Inspection Details | |
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By default bundled with: | |
Can be installed with plugin: | Java, 243.23126 |
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