Why I Am Unable to Use Collectors in My Code in Java Stream? [Closed]

Name: Why I Am Unable to Use Collectors in My Code in Java Stream? [Closed]
Uploaded: 2026-09-27T03:24:27+00:00
Duration: 10 min 27 s
Description: Import Static Java. Util. Stream. Collectors. *; Import Java. Util. *; Import Java. Lang. *; //Import Java. Util. Collections; Public Class Helloworld{ Public...

Question

import static java.util.stream.Collectors.*;
import java.util.*;
import java.lang.*;
//import java.util.Collections;
public class HelloWorld{

 public static void main(String []args){
    System.out.println("Hello World");
    List<String> strings = Arrays.asList("abc", "", "bc", "efg", "abcd","", "jkl");
    List<String> filtered = strings.stream().filter(string -> !string.isEmpty()).collect(Collectors.toList());
    }
}

output

/tmp/java_tdo3eB/HelloWorld.java:10: error: cannot find symbol
    List<String> filtered = strings.stream().filter(string -> !string.isEmpty()).collect(Collectors.toList());
                                                                                         ^
  symbol:   variable Collectors
  location: class HelloWorld
 1 error

So i query is why i am unable to use Collectors as i have import that class also

Accepted Answer

It's your imports. Do them like this:

package experiments;

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

/**
 *
 * @author Luc Talbot
 */
public class HelloWorld {

 public static void main(String []args){
    System.out.println("Hello World");
    List<String> strings = Arrays.asList("abc", "", "bc", "efg", "abcd","", "jkl");
    List<String> filtered = strings.stream()
                                   .filter(string -> !string.isEmpty())                        
                                   .collect(Collectors.toList());
    }
}

Output is:

run: Hello World BUILD SUCCESSFUL (total time: 0 seconds)

Why I Am Unable to Use Collectors in My Code in Java Stream? [Closed]

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1 Answer

David Miller