Java lang Integer.toHexString() Method with Examples
Last Updated :
05 Dec, 2018
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.
import java.lang.Math;
class Gfg1 {
public static void main(String args[])
{
int l = 234 ;
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.
import java.lang.Math;
class Gfg1 {
public static void main(String args[])
{
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.
import java.lang.Math;
class Gfg1 {
public static void main(String args[])
{
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.
import java.lang.Math;
class Gfg1 {
public static void main(String args[])
{
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));
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