May 28, 2019 · It should be the second list to iterate on and first used to filter in. You call startsWith on the wrong String s (for example, you test if "1_".startsWith("1_John") instead of "1_John".startsWith("1_")). You should stream over nameList and use numberList for the filtering: nameList.stream()

Jan 8, 2019 · .filter(ipAddress -> clientIpAddress.startsWith(ipAddress) .*if the clientIpAddress starts with any of the values in the list then add to internalIpAddresses List. .*if clientIpAddress doesn't start with any values in list then add to externalIpAddresses List.

If you want to print and save modified values simultaneously you can do. List<String> newValues = myList.stream().map(String::toUpperCase) .peek(System.out::println).collect(Collectors.toList());

Learn how to efficiently filter strings from a list using startsWith in Java 8 and save the results to a new list with clear code examples.

Mar 7, 2025 · In this quick tutorial, we’ll explore different ways to modify or transform a list and then print its elements in Java. 2. Modifying and Printing a List. Printing a list of elements isn’t a challenge to us. For example, we can call the print action in the forEach () method:

Use the startsWith () method to check if any of the above string in the myList begins with a specific letter: TRUE is returned if any of the string begins with the specific letter, else FALSE. The following is an example to check if any String in the list starts with a letter: public static void main(final String[] args) {

System.out.println("List beginning with letter w = "); list.stream().filter((b) -> b.startsWith("w")) .forEach(System.out::println); Learn how to filter a list of strings by their starting value in Java with this comprehensive guide.

Oct 24, 2023 · The simplest way to print a List in Java is by calling its toString() method: List<String> fruits = new ArrayList<>(); fruits.add("Apple"); fruits.add("Orange"); fruits.add("Banana"); System.out.println(fruits.toString());

Suppose we have a List<String> lst in Java, and we want to print out all elements in the list. There are many ways to do this. This method uses the collection’s iterator for traversal.

Apr 16, 2012 · System.out.println(list) should print all the standard java object types (String, Long, Integer etc). In case, if we are using custom object types, then we need to override toString() method of our custom object.