Java BigInteger toString() method

The toString() method of Java BigInteger class is used to convert the numeric value of this BigInteger object to its equivalent string representation in a given radix or base.

Syntax:

public String toString()
public String toString(int radix)

Parameter:

radix - radix of the String representation.

Returns:

This method returns the String representation of this BigInteger in the given radix.

Exception:

Note:
The toString() method returns a decimal String representation of this BigInteger if radix is not given.
If the radix is outside the range from Character.MIN_RADIX(which is 2) to Character.MAX_RADIX(which is 36) inclusive, it will default to 10 (as is the case for Integer.toString).

Example 1

import java.math.BigInteger;
public class BigIntegerToStringExample1 {
	public static void main(String[] args) {
        // create a BigInteger object
        BigInteger big1;
        // create a String objects
        String str;
        // assign a value to big1
        big1 = new BigInteger("15");
        // assign String representation of big1 to str
        str = big1.toString();
        System.out.println("String representation of "+big1+" is "+str);
        }
}

Test it Now

Output:

String representation of 15 is 15

Example 2

import java.math.BigInteger;
public class BigIntegerToStringExample2 {
	public static void main(String[] args) {
        // create a BigInteger object
        BigInteger big1;
        // create a String objects
        String str;
        // assign a value to big1
        big1 = new BigInteger("15");
        // assign String value of big1 to str in radix
        str = big1.toString(1);
        System.out.println("String representation of "+big1+" in radix 1 is "+str);  	
        }
}

Test it Now

Output:

String representation of 15 in radix 1 is 15

Example 3

import java.math.BigInteger;
public class BigIntegerToStringExample3 {
	public static void main(String[] args) {
        // create a BigInteger object
        BigInteger big1;
        // create a String objects
        String str;
        // assign a value to big1
        big1 = new BigInteger("15");
        // assign String value of big1 to str in radix
        str = big1.toString(9);
        System.out.println("String representation of "+big1+" in radix 9 is "+str);  
        }
}

Test it Now

Output:

String representation of 15 in radix 9 is 16

Example 4

import java.math.BigInteger;
public class BigIntegerToStringExample4 {
	public static void main(String[] args) {
        // create a BigInteger object
        BigInteger big1;
        // create a String objects
        String str;
        // assign a value to big1
        big1 = new BigInteger("255");
        // assign String value of big1 to str in radix
        str = big1.toString(9);
        System.out.println("String representation of "+big1+" in radix 9 is "+str);  
        }
}

Test it Now

Output:

String representation of 255 in radix 9 is 313

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Java BigInteger toString() method

Syntax:

Parameter:

Returns:

Exception:

Example 1

Example 2

Example 3

Example 4