Tutorial Playlist
191 Lessons1. Introduction to Java
2. What is Java?
3. History of Java
4. Java Tutorial for Beginners
5. How Do Java Programs Work?
6. JDK in Java
7. C++ Vs Java
8. Java vs. Python
9. Java vs. JavaScript
10. From Java Source Code to Executable
11. How to Install Java in Linux
12. How to Install Java in Windows 10
13. Java Hello World Program
14. Structure of Java Program and Java Syntax
15. Operators in Java
16. Java If-else
17. Switch Case In Java
18. Loops in Java
19. Infinite loop in Java
20. For Loop in Java
21. For Each Loop in Java
22. Constructor in Java
23. Constructor Overloading in Java
24. Copy Constructor in Java
25. Default Constructor in Java
26. Parameterized Constructors in Java
27. Constructor Chaining In Java
28. Finalize Method in Java
29. Static Method in Java
30. Equals Method in Java
31. Abstract Method in Java
32. toString() Method in Java
33. Difference between equals method in Java
34. Inheritance in Java
35. Multiple Inheritance in Java
36. Hierarchical Inheritance in Java
37. Java Classes and Objects
38. Scanner Class in java
39. All classes in java are inherited from which class
40. What is Nested Class in Java
41. POJO Class in Java
42. Anonymous Class in Java
43. Final Class in Java
44. Object Class in Java
45. Packages in Java
46. Access Modifiers in Java
47. Static Keyword In Java
48. Final Keyword in Java
49. Checked and Unchecked Exceptions in Java
50. User Defined Exception in Java
51. Error vs. Exception in Java
52. Java Collection
53. Collections in Java
54. Garbage Collection in Java
55. Generics In Java
56. Java Interfaces
57. Functional Interface in Java
58. Marker Interface in Java
59. Streams in Java
60. Byte stream in java
61. File Handling in Java
62. Thread in Java
63. Thread Lifecycle In Java
64. Daemon Thread in Java
65. Thread Priority in Java
66. Deadlock in Java
67. String Pool in Java
68. Java Database Connectivity(JDBC)
69. Design Patterns in Java
70. Functional Programming in Java
71. OOP vs Functional vs Procedural
72. Heap Memory and Stack Memory in Java
73. Applet in Java
74. Java Swing
75. Java Frameworks
76. Hibernate Framework
77. JUnit Testing
78. How to Install Eclipse IDE for Java?
79. Command line arguments in Java
80. Jar file in Java
81. Java Clean Code
82. OOPs Concepts in Java
83. Java OOPs Concepts
84. Overloading vs Overriding in Java
85. Java 8 features
86. String in Java
87. String to int in Java
88. Why String Is Immutable in Java?
89. Primitive Data Types in Java
90. Non-Primitive Data Types in Java
91. This and Super Keyword in Java
92. HashMap in Java
93. Comparable And Comparator in Java
94. Type Casting in Java
95. Arrays Sort in Java with Examples
96. Variable Hiding and Variable Shadowing in Java
97. Enum in Java
98. Substring in Java
99. Pattern Programs in Java
100. Hashcode in Java
101. What is ByteCode in Java?
102. How To Take Input From User in Java
103. GCD of Two Numbers in Java
104. Linked List in Java
105. Arithmetic Operators in Java
106. Conditional Operators in Java
107. Stack and Queue in Java
108. Array Length in Java
109. Number Pattern Program in Java
110. Split in java
111. Map In Java
112. Difference Between Throw and Throws in Java
113. Difference Between Data Hiding and Abstraction
114. HashSet in Java
115. String Length in Java
116. Factorial Using Recursion in Java
117. DateFormat in Java
118. StringBuilder Class in java
119. Instance variables in Java
120. Java List Size
121. Java APIs
122. Reverse an Array in Java
123. StringBuffer and StringBuilder Difference in Java
124. Java Program to Add Two Numbers
125. String to Array in Java
126. Regular Expressions in Java
127. Identifiers in Java
128. Data Structures in Java
129. Set in Java
130. Pass By Value and Call By Reference in Java
131. Try Catch in Java
132. Bubble Sort in Java
133. Caesar Cipher Program in Java
134. Queue in Java
135. Object Creation in Java
136. Multidimensional Array in Java
137. How to Read a File in Java
138. String Comparison in Java
139. Volatile Keyword in Java
140. Control Statements in Java
141. Jagged Array in Java
142. Two-Dimensional Array in Java
143. Java String Format
144. Replace in Java
145. charAt() in Java
146. CompareTo in Java
147. Matrix Multiplication in Java
148. Static Variable in Java
149. Event Handling in Java
150. parseInt in Java
151. Java ArrayList forEach
152. Abstraction in Java
153. String Input in Java
154. Logical Operators in Java
155. instanceof in Java
156. Math Floor in Java
157. Selection Sort Java
158. int to char in Java
159. Stringtokenizer in java
160. Implementing and Manipulating Abs in Java
Now Reading
161. Char array to string in java
162. Convert Double To String In Java
163. Deque in Java
164. Converting a List to an Array in Java
165. The Max function in java
166. Removing whitespace from string in java
167. String arrays in Java
168. Strings in Java Vs Strings in Cpp
169. Sum of digits of a number in Java
170. Art of Graphical User Interfaces
171. Trim in Java
172. RxJava
173. Recursion in Java
174. HashSet Java
175. Difference Between Java and Python
176. Square Root in Java
177. Reverse A String in Java
178. Even Odd Program in Java
179. Fibonacci Series in Java
180. Prime Number Program in Java
181. Java Program to Print Prime Numbers in a Given Range
182. Java Leap Year Program
183. Swapping of Two Numbers in Java
184. LCM of Two Numbers in Java
185. Math.sqrt() Function in Java
186. Area of Triangle in Java
187. Sort a String In Java
188. Factorial Program in Java
189. Javafx
190. Lambda expression in java
191. Setup Java Home and IDE on macOS
In Java programming, the abs() method plays a crucial role when it comes to dealing with absolute values. Whether you want to find the absolute difference between two numbers or convert negative elements in an array to positive, the abs() method comes to the rescue. In this article, we will dive into the implementation and manipulation of absolute values, exploring the syntax, parameters, return values, exceptions, and practical examples of the abs() method in Java.
The abs() method in Java is a part of the Math class in Java, which provides a wide range of mathematical functions. It allows you to calculate the absolute value of a given number. This method works with both integer and floating-point values, making it versatile for various scenarios.
The syntax of the abs() method in Java is as follows:
public static int abs(int value)
The abs() method takes a single parameter, value, which represents the number for which we want to find the absolute value. It returns an integer value that represents the absolute value of the input number.
Only one parameter, an int, float, long, or double data type, is required by the Math.abs() function. Only these data types can use the Math.abs() method.
Math.abs() returns a representation of the number that is non-negative and has an absolute value. The argument determines the type of the return value; for example, if the parameter's data type is an int or float, the return type will be an int or float, respectively.
The abs() method returns the same non-negative number if the parameter is non-negative.
The abs() method in Java does not throw any exceptions. It is a straightforward and safe method to use in your programs. Let's use an illustration to clarify the exception:
class Main{
public static void main(String args[]){
System.out.println(Math.abs("Lander"));
}
}
Output:
The "Lander" is a type of String; that's why the abs() method causes an exception because it cannot handle the String data types.
Let's explore some examples to understand how the abs() method works in Java.
Example 1: The Absolute Value of Integer.MIN_VALUE
public class AbsoluteValueExample {
public static void main(String[] args) {
int absoluteValue = Math.abs(Integer.MIN_VALUE);
System.out.println("Absolute Value: " + absoluteValue);
}
}
Output:
In this example, we calculate the absolute value of the constant Integer. MIN_VALUE represents the minimum value that can be stored in an integer.
Example 2: Find the Absolute Value of -0
public class AbsoluteValueExample {
public static void main(String[] args) {
double absoluteValue = Math.abs(-0.0);
System.out.println("Absolute Value: " + absoluteValue);
}
}
Output:
In this example, we calculate the absolute value of -0.0. The abs() method treats -0.0 as a negative value and returns 0.0 as the absolute value.
Example 3: Convert All the Negative Elements of an Array to Positive
public class AbsoluteValueExample {
public static void main(String[] args) {
int[] numbers = {-5, -10, -15, -20};
for (int i = 0; i < numbers.length; i++) {
numbers[i] = Math.abs(numbers[i]);
}
// Print the updated array
System.out.print("Updated Array: ");
for (int number : numbers) {
System.out.print(number + " ");
}
System.out.println();
}
}
Output:
In this example, we have an array of numbers with negative elements. We iterate through the array and use the abs() method to convert each negative element to its positive equivalent.
The abs() method in Java is not limited to integers and floating-point values. It can also be used with other numeric types, such as long, short, byte, and their respective wrapper classes. The behavior remains the same across these types, providing flexibility in your programming endeavors.
Practical Example of abs() in Java
Let's consider a practical example to showcase the application of the abs() method.
Suppose we have a scenario where we need to calculate the absolute difference between two numbers in Java. We can achieve this using the abs() method as follows:
public class AbsoluteDifferenceExample {
public static void main(String[] args) {
int number1 = 20;
int number2 = 35;
int absoluteDifference = Math.abs(number1 - number2);
System.out.println("Absolute Difference: " + absoluteDifference);
}
}
Output:
In this example, we subtract number 2 from number 1 and calculate the absolute value of the difference using the abs() method. The resulting ‘absoluteDifference’ variable will hold the absolute difference between the two numbers.
In JavaScript, the Math.abs() function is used to calculate the absolute value of a number. It returns the positive value of the given number, regardless of its sign. Let's explore how to use Math.abs() in JavaScript:
Syntax of Math.abs() in JavaScript:
The syntax of the Math.abs() function in JavaScript is as follows:
Math.abs(x)
The Math.abs() function takes a single parameter x, which represents the number for which you want to calculate the absolute value. It returns the absolute value of the input number as a result.
Example 1: Calculating the Absolute Value of a Positive Number
var number = 10;
var absoluteValue = Math.abs(number);
console.log(absoluteValue);
Output:
In this example, we have a variable number with a value of 10. We use the Math.abs() function to calculate the absolute value of the number and store the result in the variable absoluteValue.
Example 2: Calculating the Absolute Value of a Negative Number
var number = -15;
var absoluteValue = Math.abs(number);
console.log(absoluteValue);
Output:
In this example, we have a variable number with a value of -15.
We use the Math.abs() function to calculate the absolute value of the number and store the result in the variable absoluteValue.
The output will be 15 since the absolute value of -15 is 15.
If you want to calculate the absolute value without using the Math.abs() method from the Java Math class, you can write a simple conditional statement to achieve the same result. Here's an example:
public class AbsoluteValueExample {
public static void main(String[] args) {
int number = -15;
int absoluteValue = (number < 0) ? -number : number;
System.out.println("Absolute Value: " + absoluteValue);
}
}
In this code, we have a class named AbsoluteValueExample with a main method. Inside the main method, we have a variable number with a value of -15.
We use a conditional statement, also known as the ternary operator (?:), to check if the number is less than zero.
If it is, we multiply the number by -1 to get the positive value; otherwise, we assign the number itself to absoluteValue. Finally, we print the absolute value using the System.out.println() statement.
When you run this code, the output will be:
By using a conditional statement, we can calculate the absolute value without relying on the Math.abs() method.
The Math.abs() method in Java returns the absolute value of the given numeric argument as a result. The return type depends on the kind of argument passed to it.
Here are the different return types for various arguments:
In all cases, the return type matches the type of the argument provided.
For example:
int absoluteValueInt = Math.abs(-5); // Returns an int value
long absoluteValueLong = Math.abs(-100L); // Returns a long value
float absoluteValueFloat = Math.abs(-3.14f); // Returns a float value
double absoluteValueDouble = Math.abs(-2.5); // Returns a double value
In the above code, we demonstrate how the return type of Math.abs() depends on the argument type. The method is called with different argument types, and the return value is assigned to variables of matching types.
If you want to calculate the absolute values of elements in an array in Java using the Math.abs() method, you can iterate over the array and apply the method to each element. Here's an example:
public class AbsoluteValueArrayExample {
public static void main(String[] args) {
int[] numbers = {-5, -10, -15, -20};
for (int i = 0; i < numbers.length; i++) {
numbers[i] = Math.abs(numbers[i]);
}
// Print the updated array
for (int number : numbers) {
System.out.print(number + " ");
}
}
}
Output:
In this code, we have a class named AbsoluteValueArrayExample with a main method. Inside the main method, we have an array of numbers containing negative elements.
We iterate over the array using a for loop and apply the Math.abs() method to each element, replacing the negative values with their absolute values.
The updated values are stored back in the array. Finally, we print the updated array using an enhanced for-each loop.
The abs() method in Java is a powerful tool when it comes to dealing with absolute values. It allows you to find the absolute difference between two numbers, convert negative elements in an array to positive, or simply obtain the absolute value of any given number. By understanding its syntax, parameters, return values, and exceptions, you can confidently utilize the abs() method in your Java programs. Its versatility and ease of use make it an essential component in your mathematical operations toolkit.
1. How does the abs() method handle overflow for int or long values?
The abs() method in Java properly handles overflow for int and long values. It returns the absolute value within the range of the data type. If the input value exceeds the maximum positive value for the data type, the method will return a negative value due to overflow.
2. How can the abs() method be used with complex numbers or non-numeric types?
The abs() method in Java is designed for numeric types and cannot be directly used with complex numbers or non-numeric types. To calculate the absolute value of complex numbers or non-numeric types, you would need to implement a custom method or utilize appropriate libraries or classes specifically designed for those types.
3. How does the abs() method handle special cases such as NaN or Infinity?
The abs() method in Java follows the rules of IEEE 754 standard for handling special cases. When the input is NaN (Not-a-Number) or Infinity, the method will preserve its value and return it as the absolute value. This behavior ensures consistency with the standard and avoids any unexpected results.
4. What is the return type of the abs() method in Java?
The return type of the abs() method in Java matches the data type of the input parameter. For example, if the input is an int, the method returns an int; if the input is a double, the method returns a double, and so on.
PAVAN VADAPALLI
Director of Engineering
Director of Engineering @ upGrad. Motivated to leverage technology to solve problems. Seasoned leader for startups and fast moving orgs. Working …Read More
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upGrad does not grant credit; credits are granted, accepted or transferred at the sole discretion of the relevant educational institution offering the diploma or degree. We advise you to enquire further regarding the suitability of this program for your academic, professional requirements and job prospects before enr...