Review

Invokes stream operations without a terminal action that causes the operations to actually be performed. Add a terminal operation to trigger execution or replace last operation by a terminal one.

• missing/call
• superfluous/call

com/xpinjection/java8/misused/stream/incorrect/ForgotTerminalOperation.java

willDoNothingInReality()

class ForgotTerminalOperation {
    @Bad
    public void willDoNothingInReality() {
        IntStream.range(1, 5)
                .peek(System.out::println)
                .peek(i -> {
                    if (i == 5)
                        throw new RuntimeException("bang");
                });
    }

}

public class WithTerminalOperation {
    public void correctUsage() {
        IntStream.range(1, 5).forEach(System.out::println);
    }
}