BitSet toString() Method in Java with Examples

The java.util.BitSet.toString() is an inbuilt method of BitSet class that is used to get a string representation of the bits of the sets in the form of a set of entries separated by “, “. So basically the toString() method is used to convert all the elements of BitSet into String. In addition to this for every index of the bits in the set state, the decimal representation of that index is also included in the result.

Syntax:

Bit_Set.toString()

Parameter: The method does not take any parameters.



Return value: The method returns the set consisting of the string representation of the elements of the given BitSet.

Below programs illustrate the working of java.util.BitSet.toString() method:
Program 1:

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// Java code to illustrate toString()
import java.util.*;
  
public class BitSet_Demo {
    public static void main(String args[])
    {
        // Creating an empty BitSet
        BitSet init_bitset = new BitSet();
  
        // Use set() method to add elements into the Set
        init_bitset.set(40);
        init_bitset.set(25);
        init_bitset.set(31);
        init_bitset.set(100);
        init_bitset.set(53);
  
        // Displaying the BitSet
        System.out.println("BitSet: " + init_bitset);
  
        // Displaying the toString() working
        System.out.println("The String representation: "
                           + init_bitset.toString());
    }
}

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Output:

BitSet: {25, 31, 40, 53, 100}
The String representation: {25, 31, 40, 53, 100}

Program 2:

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// Java code to illustrate toString()
import java.util.*;
  
public class BitSet_Demo {
    public static void main(String args[])
    {
        // Creating an empty BitSet
        BitSet init_bitset = new BitSet();
  
        // Use set() method to add elements into the Set
        init_bitset.set(10);
        init_bitset.set(20);
        init_bitset.set(30);
        init_bitset.set(40);
        init_bitset.set(50);
  
        // Displaying the BitSet
        System.out.println("BitSet: " + init_bitset);
  
        // Displaying the toString() working
        System.out.println("The String representation: "
                           + init_bitset.toString());
    }
}

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Output:

BitSet: {10, 20, 30, 40, 50}
The String representation: {10, 20, 30, 40, 50}


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