An absolute value is a positive value that represents a non-negative value of the given value. For example, the absolute value of -3 will be 3 and the same for positive 3 as well.
Input number can be positive or negative but the absolute value always be a positive number.
In Java, To get an absolute value of any number, the Math class provides abs() method. Although, we can make our own custom code as well to get the absolute value.
Let's understand with examples.
In this example, we used our own custom code to get an absolute value. This is a simple approach and a single-line solution as well.
/*
* Code example to find absolute value in Java
*/
public class JExercise {
public static void main(String[] args) {
// absolute value of integer value
int a = - 10;
int result = (a<0) ? -a : a;
System.out.println(result);
}
}Output:
10
Java Math.abs() method is a built-in method of Math class that returns the absolute value of the given input.
/*
* Code example to find absolute value in Java
*/
public class JExercise {
public static void main(String[] args) {
int a = - 10;
int b = 12;
int result = Math.abs(a);
System.out.println(result);
result = Math.abs(b);
System.out.println(result);
}
}Output:
10
12
Java Math class has several built-in overloaded methods of abs() method to find the absolute value of other data types as well. See the below table.
|
Modifier and Type |
Method and Description |
|---|---|
|
static double abs(double a) |
It takes a double type value as a parameter and returns the absolute value of a double value. |
|
static float abs(float a) |
It takes a float type parameter and returns the absolute value of a float value. |
|
static int abs(int a) |
It takes an int type parameter and returns the absolute value of an int value. |
|
static long abs(long a) |
It takes a long type parameter and Returns the absolute value of a long value. |
In this example, we used all the overloaded versions of the Math.abs() method to get the absolute value of int, long, float, and double type. See the example below.
/*
* Code example to find absolute value of int, float, long, and double in Java
*/
public class JExercise {
public static void main(String[] args) {
// absolute value of integer value
int a = - 10;
int result = Math.abs(a);
System.out.println(result);
// absolute value of long value
long b = - 10;
long result2 = Math.abs(b);
System.out.println(result2);
// absolute value of float value
float c = - 10;
float result3 = Math.abs(c);
System.out.println(result3);
// absolute value of double value
double d = - 10;
double result4 = Math.abs(d);
System.out.println(result4);
}
}Output:
10
10
10.0
10.0
This is a case, where the abs() method returns a negative value. If we get the absolute value of integer minimum value then this method returns the same value with a negative sign. See the example below.
/*
* Code example to find absolute value in Java
*/
public class JExercise {
public static void main(String[] args) {
// absolute value of integer value
int a = Integer.MIN_VALUE;
int result = Math.abs(a);
System.out.println(result);
}
}Output:
-2147483648
The absolute value of 0 and -0 will be positive zero. See the example below.
/*
* Code example to find absolute value in Java
*/
public class JExercise {
public static void main(String[] args) {
// absolute value of integer value
int result = Math.abs(-0);
System.out.println(result);
result = Math.abs(0);
System.out.println(result);
}
}Output:
0
0
The absolute value of negative infinity and positive infinity is an infinity
/*
* Code example to find absolute value in Java
*/
public class JExercise {
public static void main(String[] args) {
// absolute value of integer value
double result = Math.abs(Double.NEGATIVE_INFINITY);
System.out.println(result);
result = Math.abs(Double.NaN);
System.out.println(result);
}
}Output:
Infinity
NaN
