New String methods

Definition

Java 11 added useful String methods: isBlank (empty or only spaces), strip (trim that understands Unicode), lines (split into lines as a stream) and repeat.

Example code

The four new String helpers

class Demo {
    public static void main(String[] args) {
        System.out.println("   ".isBlank());                       // true
        System.out.println("[" + "  hi  ".strip() + "]");           // [hi]
        System.out.println("ab".repeat(3));

        "first\nsecond\nthird".lines()
                .map(line -> "> " + line)
                .forEach(System.out::println);
    }
}

// Output:
// true
// [hi]
// ababab
// > first
// > second
// > third