Java Examples - Array Union
Java ExamplesThe following example demonstrates how to use the union () method to calculate the union of two arrays:
Main.java file
import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;
public class Main {
public static void main(String[] args) throws Exception {
String[] arr1 = { "1", "2", "3" };
String[] arr2 = { "4", "5", "6" };
String[] result_union = union(arr1, arr2);
System.out.println("The result of the union is as follows:");
for (String str : result_union) {
System.out.println(str);
}
}
//Find the union of two string arrays, using the uniqueness of set elements
public static String[] union(String[] arr1, String[] arr2) {
Set<String> set = new HashSet<String>();
for (String str : arr1) {
set.add(str);
}
for (String str : arr2) {
set.add(str);
}
String[] result = { };
return set.toArray(result);
}
}
The output of the above code is:
并集的结果如下： 3 2 1 6 5 4Other Extensions