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

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

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

Set<String> setStr = new HashSet<>(Arrays.asList("50", "100", "150", "200", "250", "300", "500"));

Now, convert it to set of Integer −

Set<Integer> setInteger = setStr.stream().map(s -> Integer.parseInt(s)).collect(Collectors.toSet());

Example

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

import java.util.*;
import java.util.stream.*;
public class Demo {
   public static void main(String args[]) {
      Set<String> setStr = new HashSet<>(Arrays.asList("50", "100", "150", "200", "250", "300", "500"));
      System.out.println("Set (String) = " + setStr);
      Set<Integer> setInteger = setStr.stream().map(s -> Integer.parseInt(s))
         .collect(Collectors.toSet());
      System.out.println("Set (Integer) = " + setInteger);
   }
}

Output

Set (String) = [100, 200, 300, 500, 50, 150, 250]
Set (Integer) = [50, 100, 500, 150, 200, 250, 300]
Updated on: 2019-09-23T14:02:02+05:30

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