Java - Integer toHexString() method

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Description

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

Declaration

Following is the declaration for java.lang.Integer.toHexString() method

public static String toHexString(int i)

Parameters

i − This is an integer to be converted to a string.

Return Value

This method returns the string representation of the unsigned integer value represented by the argument in hexadecimal (base 16).

Exception

NA

Example 1

The following example shows the usage of Integer toHexString() method to get the hexadecimal string representation of the specified int value. We've created a int variable and assigned it a positive int value. Then using toHexString() method, we're printing the result.

package com.tutorialspoint;
public class IntegerDemo {
   public static void main(String[] args) {
      int i = 170;
      System.out.println("Number = " + i);
    
      /* returns the hexadecimal string representation of the given number */
      System.out.println("toHexString = " + Integer.toHexString(i));
   }
}

Output

Let us compile and run the above program, this will produce the following result −

Number = 170
toHexString = aa

Example 2

The following example shows the usage of Integer toHexString() method to get the hexadecimal string representation of the specified int value. We've created a int variable and assigned it a negative int value. Then using toHexString() method, we're printing the result.

package com.tutorialspoint;
public class IntegerDemo {
   public static void main(String[] args) {
      int i = -170;
      System.out.println("Number = " + i);
    
      /* returns the hexadecimal string representation of the given number */
      System.out.println("toHexString = " + Integer.toHexString(i));
   }
}

Output

Let us compile and run the above program, this will produce the following result −

Number = -170
toHexString = ffffff56

Example 3

The following example shows the usage of Integer toHexString() method to get the hexadecimal string representation of the specified int value. We've created a int variable and assigned it a zero value. Then using toHexString() method, we're printing the result.

package com.tutorialspoint;
public class IntegerDemo {
   public static void main(String[] args) {
      int i = 0;
      System.out.println("Number = " + i);
    
      /* returns the hexadecimal string representation of the given number */
      System.out.println("toHexString = " + Integer.toHexString(i));
   }
}

Output

Let us compile and run the above program, this will produce the following result −

Number = 0
toHexString = 0