Syntax error Program to convert set of Integer to Array of Integer in Java

Program to convert set of Integer to Array of Integer in Java

Let’s say the following is our set of Integer −

Set<Integer> set = new HashSet<>(Arrays.asList(50, 100, 150, 200, 400, 600, 800, 1000, 1200, 1500));

Now, convert it to Array of Integer −

int[] arr = set.stream()
   .mapToInt(Integer::intValue)
   .toArray();

Example

Following is the program to convert set of Integer to Array of Integer in Java −

import java.util.*;
import java.util.stream.*;
import java.util.function.Function;
public class Demo {
   public static void main(String args[]) {
      Set<Integer> set = new HashSet<>(Arrays.asList(50, 100, 150, 200, 400, 600, 800, 1000, 1200, 1500));
      System.out.println("Set = " + set);
      int[] arr = set.stream().mapToInt(Integer::intValue).toArray();
      System.out.println("Array = "+ Arrays.toString(arr));
   }
}

Output

Set = [400, 800, 1200, 50, 100, 150, 200, 600, 1000, 1500]
Array = [400, 800, 1200, 50, 100, 150, 200, 600, 1000, 1500]
Updated on: 2019-09-23T13:57:11+05:30

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