Convert String into comma separated List in Java
Given a String, the task is to convert it into comma separated List.
Examples:
Input: String = "Beginner For Beginner" Output: List = [Beginner, For, Beginner] Input: String = "G e e k s" Output: List = [G, e, e, k, s]
Approach: This can be achieved by converting the String into String Array, and then creating an List from that array. However this List can be of 2 types based on their method of creation – modifiable, and unmodifiable.
- Creating an unmodifiable List:
// Java program to convert String
// to comma separated List
import
java.util.*;
public
class
GFG {
public
static
void
main(String args[])
{
// Get the String
String string =
"Beginner For Beginner"
;
// Print the String
System.out.println(
"String: "
+ string);
// convert String to array of String
String[] elements = string.split(
" "
);
// Convert String array to List of String
// This List is unmodifiable
List<String> list = Arrays.asList(elements);
// Print the comma separated List
System.out.println(
"Comma separated List: "
+ list);
}
}
Output:String: Beginner For Beginner Comma separated List: [Beginner, For, Beginner]
- Creating a modifiable List:
// Java program to convert String
// to comma separated List
import
java.util.*;
public
class
GFG {
public
static
void
main(String args[])
{
// Get the String
String string =
"Beginner For Beginner"
;
// Print the String
System.out.println(
"String: "
+ string);
// convert String to array of String
String[] elements = string.split(
" "
);
// Convert String array to List of String
// This List is modifiable
List<String>
list =
new
ArrayList<String>(
Arrays.asList(elements));
// Print the comma separated List
System.out.println(
"Comma separated List: "
+ list);
}
}
Output:String: Beginner For Beginner Comma separated List: [Beginner, For, Beginner]
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