Question

How to join two collections in Java

Answer 1

import java.util.Arrays;
import java.util.Collection;
import java.util.stream.Stream;
import java.util.stream.Collectors;

public class MyClass {
    public static void main(String args[]) {
        Collection<String> co1 = Arrays.asList("java", "c", "c++");
        Collection<String> co2 = Arrays.asList("python", "php");
    
        Collection<String> result = Stream.concat(
                        co1.stream(), co2.stream())
                        .collect(Collectors.toList());
    
        System.out.println(result);
    }
}




/*
run:

[java, c, c++, python, php]

*/

 

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