How to Convert a Set of Floats to a Set of Strings in Java - Step by Step Examples

How to Convert a Set of Floats to a Set of Strings in Java ?

Answer

To convert a set of floats to a set of strings in Java, you can use streams to map each float to its string representation and collect the results into a new set.


✐ Examples

1 Convert Set of Floats to Set of Strings Example 1

In this example,

  1. First, we create a set named floatSet using the Set.of method, which contains the float values 1.1f, 2.2f, and 3.3f. This is done using the Float class to box the primitive float values.
  2. Next, we use the stream method on floatSet to create a stream of the set's elements.
  3. We then apply the map function to the stream. The map function takes a lambda expression f -> f.toString() that converts each float to its string representation.
  4. The collect method is then used to gather the results of the map operation into a new set. We use Collectors.toSet() to achieve this.
  5. The resulting set of strings is stored in a variable named stringSet.
  6. Finally, we print the value of stringSet to standard output using System.out.println.

Java Program

import java.util.Set;
import java.util.stream.Collectors;

public class Main {
    public static void main(String[] args) {
        Set<Float> floatSet = Set.of(1.1f, 2.2f, 3.3f);
        Set<String> stringSet = floatSet.stream()
                                        .map(f -> f.toString())
                                        .collect(Collectors.toSet());
        System.out.println("Set of strings: " + stringSet);
    }
}

Output

Set of strings: [1.1, 2.2, 3.3]

2 Convert Set of Floats to Set of Strings Example 2

In this example,

  1. We start by defining a set named floatSet2 using the Set.of method, which contains the float values 4.4f, 5.5f, and 6.6f.
  2. We then create a stream from floatSet2 by calling the stream method on it.
  3. Using the map function, we convert each float in the stream to its string representation using the lambda expression f -> f.toString().
  4. The collect method is used to gather the results into a set by using Collectors.toSet().
  5. The resulting set of strings is stored in a variable called stringSet2.
  6. Finally, we print the value of stringSet2 to standard output using System.out.println.

Java Program

import java.util.Set;
import java.util.stream.Collectors;

public class Main {
    public static void main(String[] args) {
        Set<Float> floatSet2 = Set.of(4.4f, 5.5f, 6.6f);
        Set<String> stringSet2 = floatSet2.stream()
                                         .map(f -> f.toString())
                                         .collect(Collectors.toSet());
        System.out.println("Set of strings: " + stringSet2);
    }
}

Output

Set of strings: [4.4, 5.5, 6.6]

Summary

In this tutorial, we learned How to Convert a Set of Floats to a Set of Strings in Java language with well detailed examples.


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