Java Integer.toHexString() – Syntax & Examples

Java Integer.toHexString() – Examples

In this tutorial, we will learn about Java Integer.toHexString() method, and learn how to use this method to find the hexadecimal representation of given integer, with the help of examples.

toHexString(int i)

Integer.toHexString() returns a string representation of the integer argument as an unsigned integer in base 16.

The digits in a hexadecimal string are 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, F.

Syntax

The syntax of toHexString() method with an integer as parameter is

Integer.toHexString(int i)

where

Parameter	Description
i	The integer whose hexadecimal representation has to be found.

Returns

The method returns value of type String.

Example 1 – toHexString()

In this example, we will take an integer and find its hexadecimal representation using Integer.toHexString() method.

Java Program

public class Example {
	public static void main(String[] args){
		int i = 31;
		String result = Integer.toHexString(i);
		System.out.println("Result of toHexString("+i+") = " + result);
	}
}

Output

Result of toHexString(31) = 1f

Example 2 – toHexString() – Negative Integer

In this example, we will take a negative integer and find its hexadecimal representation using Integer.toHexString() method. Since, the integer is negative, and considered as an unsigned integer in base 16 by the method, we get the complement form of the integer.

Java Program

public class Example {
	public static void main(String[] args){
		int i = -31;
		String result = Integer.toHexString(i);
		System.out.println("Result of toHexString("+i+") = " + result);
	}
}

Output

Result of toHexString(-31) = ffffffe1

Conclusion

In this Java Tutorial, we have learnt the syntax of Java Integer.toHexString() method, and also how to use this method with the help of Java example programs.