**`toString()`** is an instance method of the `BitSet` class that returns the string representation of the `BitSet` object. 

The string representation includes the decimal representation of every index for which the `BitSet` object has a bit in the set state. 

These indices are given in ascending order, separated by ", " (a comma and a space), and enclosed by braces, similar to the standard mathematical notation for a collection of numbers.

The `toString` method is defined in the `BitSet` class. The `BitSet` class is defined in the `java.util` package. To import the `BitSet` class, use the following import statement.
```
import java.util.BitSet;
```

# 
#  Syntax

---

``` java
bitSet_Object.toString()
```

---

# 
## Parameters 

This method has no parameters.

##
## Return value

This method returns the string representation of the object.

## Example

import java.util.BitSet;

public class Main{

    public static void main(String[] args) {
        BitSet bitSet = new BitSet();
        bitSet.set(2);
        bitSet.set(3);
        bitSet.set(9);
        System.out.println("String representation = " + bitSet.toString());
    }
}

# 
## Code explanation

- In *line 1*, we import the `BitSet` class.
- In *line 6*, we create an empty `BitSet` object.
- In *lines 7, 8, and 9*, we use the [set](https://www.educative.io/shoteditor/4958146430238720) method to set the indexes `2`, `3`, and `9`.
- In *line 10*, we print the string representation of the `BitSet` object.

What is BitSet.toString() in Java?

toString() returns a string representation of BitSet with set indices in ascending order, enclosed by braces.