java 8 - Sonar : lambda - Remove useless curly braces around statement -

these code examples:

import java.util.observer;  public class main {     public static void main(string[] args) {         observer observer = (o, arg) -> {             if (arg != null) {                 system.out.println(arg);             }         };     } } 

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import java.util.observer;  public class main {     public static void main(string[] args) {         observer observer = (o, arg) -> {             try {                 string test = (string) arg;                 ...             }             catch (classcastexception e) {             }         };     } } 

are noncompliant sonarqube rule:

lamdbas containing 1 statement should not nest statement in block : remove useless curly braces around statement

how can fix ?

the classification of these curly braces “useless” wrong.

you can omit curly braces around single expression statement, is, example, method invocation, new expression, or x++, x+=y, etc.

or can transform sole … -> { return x; } statement expression … -> x.

but can’t omit curly braces around every single statement.

you can’t fix that. thing can file bug report.

by way, then, removing them not readability improvement. depends…