Remove First Character from List of Strings in Java 8

Learn how to remove first character from list of strings in Java 8 using Stream API and substring() method with examples.

Code Explanation (Step-by-Step)

  • Create a list of strings using Arrays.asList() .
  • Convert the list into a stream using stream().
  • Use map() to transform each string in the stream.
  • Apply a.substring(1) to remove the first character.
  • collect(Collectors.toList()) gathers all transformed strings into a new list.
  • Print the updated list that contains [“oe”, “ary”].
				
					import java.util.Arrays;
import java.util.List;
import java.util.stream.Collectors;

public class CharacterTest {

    public static void main(String[] args) {

        List<String> list = Arrays.asList("joe", "mary");

        List<String> names = list.stream()
                                 .map(str -> str.substring(1))
                                 .collect(Collectors.toList());

        System.out.println("List of strings: " + names);
    }
}

Output :
List of strings: [oe, ary]

Remove First Letter from List of Strings Using Streams

				
					import java.util.Arrays;
import java.util.List;
import java.util.stream.Collectors;

public class RemoveFirstLetter {

    public static void main(String[] args) {

        List<String> list = Arrays.asList("joe", "mary");

        List<String> result = list.stream()
                                  .map(str -> str.replaceFirst(".", ""))
                                  .collect(Collectors.toList());

        System.out.println(result);
    }
}
Here are some related Java 8 programs that will help you understand Stream API concepts better:   

FAQ
Which Java 8 Stream method is used to modify elements?
The map() method is used to transform each element of a stream.
What does substring(1) do in Java?
It returns a new string starting from index 1 to the end of the string.
Can Stream API modify original list elements?
No. Stream operations create a new result unless the original collection is explicitly updated.
How do I remove the first character from a string in Java?
Use the substring(1) method.

				
					String str = "Java";
System.out.println(str.substring(1));

Output :
ava

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