The Java.lang.Integer.toHexString() is a built-in function in Java which returns a string representation of the integer argument as an unsigned integer in base 16. The function accepts a single parameter as an argument in Integer data-type.
Syntax :
public static String toHexString(int num) Parameter : The function accepts a single mandatory parameter num - This parameter specifies the number which is to be converted to a Hexadecimal string. The data-type is int.
Return Value : The function returns a string representation of the int argument as an unsigned integer in base 16.
Examples:
Input : 11 Output : b Input : 12 Output : c
Program 1: The program below demonstrates the working of function.
// Java program to demonstrate working // of java.lang.Integer.toHexString() method import java.lang.Math;
class Gfg1 {
// driver code
public static void main(String args[])
{
int l = 234 ;
// returns the string representation of the unsigned int value
// represented by the argument in binary (base 2)
System.out.println( "Hex string is " + Integer.toHexString(l));
l = 11 ;
System.out.println( "Hex string is " + Integer.toHexString(l));
}
} |
Output:
Hex string is ea Hex string is b
Program 2: The program below demonstrates the working function when a negative number is passed.
// Java program to demonstrate // of java.lang.Integer.toHexString() method // negative number import java.lang.Math;
class Gfg1 {
// driver code
public static void main(String args[])
{
// when negative number is passed
System.out.println( "Hex is " + Integer.toHexString(- 10 ));
}
} |
Output:
Hex is fffffff6
Errors and Exception: Whenever a decimal number or a string is passed as an argument, it returns an error message which says “incompatible types”.
Program 3: The program below demonstrates the working function when a string number is passed.
// Java program to demonstrate // of java.lang.Integer.toHexString() method // string number import java.lang.Math;
class Gfg1 {
// driver code
public static void main(String args[])
{
// when negative number is passed
System.out.println( "Hex is " + Integer.toHexString( "12" ));
}
} |
Output:
prog.java:13: error: incompatible types: String cannot be converted to int System.out.println("Hex is " + Integer.toHexString("12"));
Program 4: The program below demonstrates the working function when a decimal is passed.
// Java program to demonstrate // of java.lang.Integer.toHexString() method // decimal import java.lang.Math;
class Gfg1 {
// driver code
public static void main(String args[])
{
// when decimal number is passed
System.out.println( "Hex is " + Integer.toHexString( 12.34 ));
}
} |
Output:
prog.java:13: error: incompatible types: possible lossy conversion from double to int System.out.println("Hex is " + Integer.toHexString(12.34));