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Here, when the compiler meet to a string literal and creates a string object str.
Syntax: -
Here, a String type is specified before meeting the string literal.
Syntax: - Company
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Overview
Control Statements
OOP Concepts
Methods
Strings
Scala Packages
Overview
Control Statements
OOP Concepts
Methods
Strings
Scala Packages
A
string
is a sequence of characters. In Scala, objects of String are immutable which means a constant and cannot be changed once created.
Creating a String in Scala
There are two ways to create a string in Scala:
var str = "Hello! GFG" val str = "Hello! GFG"
var str: String = "Hello! GFG" val str: String = "Hello! GFG"
Note:
If you need to append to the original string, then use
StringBuilder
class.
Example:
Scala
// str1 and str2 are two different strings
var
str
1
=
"Hello! GFG"
val
str
2
:
String
=
"GeeksforGeeks"
def
main(args
:
Array[String])
// Display both strings
println(str
1
);
println(str
2
);
Get length of the string
An accessor method is those methods which are used to find the information about the object. So, a
length()
method is the accessor method in Scala, which is used to find the length of the given string. Or in other words, length() method returns the number of characters that are present in the string object.
Syntax:
var len1 = str1.length();
Example:
Scala
// str1 and str2 are two strings
var
str
1
=
"Hello! GFG"
var
str
2
:
String
=
"GeeksforGeeks"
// Main function
def
main(args
:
Array[String])
// Get the length of str1 and str2 strings
// using length() function
var
LEN
1
=
str
1
.length();
var
LEN
2
=
str
2
.length();
// Display both strings with their length
println(
"String 1:"
+ str
1
+
", Length :"
+ LEN
1
);
println(
"String 2:"
+ str
2
+
", Length :"
+ LEN
2
);
String 1:Hello! GFG, Length :10 String 2:GeeksforGeeks, Length :13
Concatenating strings in Scala
when a new string is created by adding two strings is known as a concatenation of strings. Scala provides
concat()
method to concatenate two strings, this method returns a new string which is created using two strings. You can also use ‘+’ operator to concatenate two strings.
Syntax:
str1.concat(str2);
or
Syntax:
"welcome" + "GFG"
Example:
Scala
// str1 and str2 are two strings
var
str
1
=
"Welcome! GeeksforGeeks "
var
str
2
=
" to Portal"
// Main function
def
main(args
:
Array[String])
// concatenate str1 and str2 strings
// using concat() function
var
Newstr
=
str
1
.concat(str
2
);
// Display strings
println(
"String 1:"
+str
1
);
println(
"String 2:"
+str
2
);
println(
"New String :"
+Newstr);
// Concatenate strings using '+' operator
println(
"This is the tutorial"
+
" of Scala language"
+
" on GFG portal"
);
String 1:Welcome! GeeksforGeeks String 2: to Portal New String :Welcome! GeeksforGeeks to Portal This is the tutorial of Scala language on GFG portal
Creating format string
When you required format number or values in your string you will use
printf()
or
format()
methods. Other than these methods, String class also provides a methods named as format() method, this method return a String object instead of PrintStream object.
Example:
Scala
String replace(char ch1, char ch2) This function returns a new string in which the element of ch1 is replaced by the ch2. String[] split(String reg) This function splits the string around matches of the given regular expression. String substring(int i) This function returns a new string that is a substring of the given string. String trim() This function returns a copy of the string, with starting and ending whitespace removed. boolean startsWith(String prefix) This function is used to check if the given string starts with the specified prefix or not.
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Last Updated : 18 Aug, 2021 Like Article
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