String API

There are much different enhancements introduced with Java 11 to string:

• tring.repeat(int) − Give Back a string mentioned a number of times. Give Back the concatenated string.
• String.isBlank() − Checks if a string is empty or contains white spaces only.
• String.strip() − Draw out the leading and trailing whitespaces.
• String.stripLeading() − Draw out the leading whitespaces.
• String.stripTrailing() − Draw out the trailing whitespaces.
• String.lines() − Give Back the stream of lines of multi-line string.

Let’s Examine the below given example:

ApiTester.java

import java.util.ArrayList;
import java.util.List;

public class APITester {
   public static void main(String[] args) {
      String sample = " abc ";
      System.out.println(sample.repeat(2)); // " abc  abc "
      System.out.println(sample.isBlank()); // false
      System.out.println("".isBlank()); // true
      System.out.println("   ".isBlank()); // true
      System.out.println(sample.strip()); // "abc"
      System.out.println(sample.stripLeading()); // "abc "
      System.out.println(sample.stripTrailing()); // " abc"
      sample = "This\nis\na\nmultiline\ntext.";

      List<String> lines = new ArrayList<>();

      sample.lines().forEach(line -> lines.add(line));
      lines.forEach(line -> System.out.println(line));
   }
}

Output

abc  abc 
false
true
true
abc
abc 
 abc
This
is
a
multiline
text.