The code snippet in the Java doc of Stream.peek is incorrect:

     * <pre>{@code
     * list.stream()
     * .filter(filteringFunction)
     * .peek(e -> System.out.println("Filtered value: " + e));
     * .map(mappingFunction)
     * .peek(e -> System.out.println("Mapped value: " + e));
     * .collect(Collectors.intoList());
     * }</pre>

it should be "Collectors.toList());"

There are similar errors on the same method for primitive streams