how to get unique values in array java easily code example
Example 1: return unique values array from two arrays java
import java.util.Arrays;
import java.util.List;
import java.util.stream.Collectors;
import java.util.stream.Stream;
public class MergeNames {
public static String[] uniqueNames(String[] names1, String[] names2) {
String[] combine = Stream.concat(Arrays.stream(names1), Arrays.stream(names2))
.toArray(String[]::new);
List<String> distinctElements = Arrays.stream(combine)
.distinct()
.collect(Collectors.toList());
return distinctElements.toArray(new String[distinctElements.size()]);
}
public static void main(String[] args) {
String[] names1 = new String[] {"Ava", "Emma", "Olivia"};
String[] names2 = new String[] {"Olivia", "Sophia", "Emma"};
System.out.println(String.join(", ", MergeNames.uniqueNames(names1, names2)));
}
}
Example 2: unique elements in array java
import java.util.ArrayList;
public class UniqueNumbersInArray {
public static void main(String[] args) {
int arr[] = { 4,5,5,4,5,6,5,8,4,7};
ArrayList<Integer> uniqueArr = new ArrayList<Integer>();
for (int i = 0; i < arr.length; i++) {
int k = 0;
if (!uniqueArr.contains(arr[i])){
uniqueArr.add(arr[i]);
k++;
for (int j = i; j < args.length ; j++) {
if (arr[i]==arr[j]){
k++;
}
}
System.out.println(arr[i]);
System.out.println(k);
}
}
}
}