Groovy - Strings

A String literal is constructed in Groovy by enclosing the string text in quotations.

Groovy offers a variety of ways to denote a String literal. Strings in Groovy can be enclosed in single quotes (’), double quotes (“), or triple quotes (“””). Further, a Groovy String enclosed by triple quotes may span multiple lines.

Following is an example of the usage of strings in Groovy −

class Example { 
   static void main(String[] args) { 
      String a = 'Hello Single'; 
      String b = "Hello Double"; 
      String c = "'Hello Triple" + "Multiple lines'";
		
      println(a); 
      println(b); 
      println(c); 
   } 
}

When we run the above program, we will get the following result −

Hello Single 
Hello Double 
'Hello TripleMultiple lines'

String Indexing

Strings in Groovy are an ordered sequences of characters. The individual character in a string can be accessed by its position. This is given by an index position.

String indices start at zero and end at one less than the length of the string. Groovy also permits negative indices to count back from the end of the string.

Following is an example of the usage of string indexing in Groovy −

class Example { 
   static void main(String[] args) { 
      String sample = "Hello world"; 
      println(sample[4]); // Print the 5 character in the string
		
      //Print the 1st character in the string starting from the back 
      println(sample[-1]); 
      println(sample[1..2]);//Prints a string starting from Index 1 to 2 
      println(sample[4..2]);//Prints a string starting from Index 4 back to 2 
      
   } 
}

When we run the above program, we will get the following result −

o 
d 
el 
oll 

Basic String Operations

First let’s learn the basic string operations in groovy. They are given below.

String Methods

Here is the list of methods supported by String class.