Java String isEmpty() Method
What is String?
In Java, A group of characters known as a string class are ones that a script interprets literally. A string is represented as a byte (or term) range information structure in order to preserve a number of components, frequently letters. The sequence may also designate additional types and arrangements of sequence (or array) data, such as more flexible arrays.
- Numerous methods, including compare(), concat(), equals(), split(), length(), replace(), compareTo(), intern(), and substring(), are available in the Java String class.
To know more about String Class in java read the complete article.
String isEmpty() Method:
The java string isEmpty() method of the String class will tell you whether the String is empty or not.The isEmpty() method of the Java String class determines if the supplied string is empty or not. Keep in mind that empty here denotes a string that has exactly zero characters.
- The java.lang.String class provides a lot of built-in methods that are used to manipulate string in Java.These methods help us to perform operations on String objects such as trimming, concatenating, converting, comparing, replacing strings etc.
The isEmpty() method will throw a NullPointerException if it is used on a null String.
Syntax:
public boolean isEmpty()
Returns:
Returns true if, and only if, length() is 0.
Let’s look at a string-related Java program where the Java String isEmpty() Method is used to perform an operation on the given string.
Example: Find out if a string is empty or not: Run
public class Main {
public static void main(String[] args) {
String myStr1 = "Hello PrepInsta";
String myStr2 = "";
System.out.println(myStr1.isEmpty());
System.out.println(myStr2.isEmpty());
}
}
Output
false true
Example 2 :Find out if a string is empty or not:
public class Main {
public static void main(String[] args) {
String myStr1 = "PrepInsta";
String myStr2 = "Prep";
System.out.println(myStr1.isEmpty());
System.out.println(myStr2.isEmpty());
}
}
Output
false false
Example 3: Find out if a string is empty or not:.
public class Main {
public static void main(String[] args) {
String myStr1 = "Prep";
String myStr2 = "Prep";
System.out.println(myStr1.isEmpty());
System.out.println(myStr2.isEmpty());
}
}
Output
false false
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