out.println("Array is null"); } } } Output: Array is null Empty Array in Java An array is empty only when it contains zero(0) elements and has zero length. We can test it by using the length property of the array object. public class SimpleTesting { String[] arr = new String...
A third common way of checking the emptiness of String in Java is comparing it with emptyString literallike"".equals(str),this method is not as fast as the previous two but it is null safe, you don't need to check for null, in case of null it will return false.So, in my opinion...
publicbooleanisEmpty(); In the given example, we first initialized an empty ArrayList and checked if it was empty. Method returnstruebecause there is nothing inside the list. ArrayList<String>list=newArrayList();Assertions.assertTrue(list.isEmpty()); Then we added an element"A"to list and ch...
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Learn: How to check whether a given string is empty or not using a java program? In this program we will use String.isEmpty() method to check given string is empty or not? String.isEmpty()It is a predefined (built-in) method of String class in Java, it returns...
Method 3: Using the inEmpty method with any library It is one of the most recommended methods in Java from Java 7 onwards that allows users to check whether a string is empty, null, or has whitespace. It lets users avoidNullPointerExceptionif users declare a null or blank string. ...
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The string.IsNullOrEmpty() method is used to check if a string has null or string.Empty value in it or not in C#.
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In Java 8, you can do this : // Convert to stream and test it boolean result = Arrays.stream(alphabet).anyMatch("A"::equals); if (result) { System.out.println("Hello A"); } 1.2 Example to check if a String Array contains multiple values : ...