How to check if Java String is Empty or Null

To see if a String is empty or null, we should write an if condition by,

• first, checking if the String object is null using the == operator.
• second, checking if the its empty using the isBlank() function from the String class.

import java.util.Arrays;
import java.util.stream.IntStream;

public class Example2 {

    public static void main(String[] args) {

        String name1 = "";
        String name2 = "Sam";
        String name3 = null;
        String name4 = " ";

        //Example 1:
        if (name1 == null || name1.isBlank()) {
            System.out.println("Name cannot be empty or null!");
        } else {
            System.out.println("Hello " + name1);
        }

        //Example 2:
        if (name2 == null || name2.isBlank()) {
            System.out.println("Name cannot be empty or null!");
        } else {
            System.out.println("Hello " + name2);
        }

        //Example 3:
        if (name3 == null || name3.isBlank()) {
            System.out.println("Name cannot be empty or null!");
        } else {
            System.out.println("Hello " + name3);
        }

        //Example 4:
        if (name4 == null || name4.isBlank()) {
            System.out.println("Name cannot be empty or null!");
        } else {
            System.out.println("Hello " + name4);
        }

    }
}