stream.limit() -> To Limit the elements
stream.sorted() -> To order elements in a List
stream.filter -> To filter by some value
stream.map() -> To transform elements
stream.count() -> To get the number of elements
limit
public static void limit(int limit) {
// We can limit the elements of a list using the function limit and put a number like
// limit in the parameters
// on this case this number is received in the method.
System.out.printf("Limit, limited to %d first values\n", limit);
numbers.stream().limit(limit).forEach(x -> System.out.print(x+" "));
}order
public static void order() {
// First we order names with default method sorted, that by default is ASC
System.out.println("Order, ASC");
names.stream().sorted().forEach(System.out::println);
System.out.println();
// Next we order names using a lambda expression, we compare y to x, x is first
// value, y is next value
System.out.println("Order, DESC");
names.stream().sorted((x,y) -> y.compareTo(x)).forEach(System.out::println);
}filter
public static void filter(String filter) {
// We can use the method filter and put a parameter, on this example
// I put a lambda expression to filter, this expressions mean the element
// need to starts with the filter that was recived in the method for exmple "J"
System.out.println("Filter, startsWith: " + filter);
names.stream().filter(x -> x.startsWith(filter)).forEach(System.out::println);
}transform
public static void transform() {
// Here we transform each number multiply by 10 after this, we will subtract 1
System.out.println("Transform, n * 10 - 1");
numbers.stream().map(x -> x*10-1).forEach(System.out::println);
System.out.println();
// Here we transform each element of names to upperCase using the method map
// and String class
System.out.println("Transform, name to upperCase");
names.stream().map(String::toUpperCase).forEach(System.out::println);
}count
public static void count() {
// We can use the method count and this method returns a long number,
// that number is the number of elements in the list
System.out.printf("Numbers count = %d", numbers.stream().count());
System.out.println();
System.out.printf("Names count = %d", names.stream().count());
}Made with ❤️ by Fer Chávez 😊
That readme file was crafted by me using pandao.guthub.io.