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
Now Reading
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
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
The ability to correctly handle dates and fulfill certain requirements in Java programming requires a solid understanding of the date formatting used in the language. This in-depth article delves into the complexities of date formatting in Java, enabling developers to more successfully manage and format dates within their applications by providing them with the knowledge they need. It goes over built-in choices such as the DateFormat class, how to create custom formats using SimpleDateFormat, how to parse text into date objects, how to handle different time zones, and best practices for handling errors. In addition to this, it adds support for the java.time package in Java 8 and subsequent versions, which provides expanded functionality for managing date-based information.
Java provides the DateFormat class to handle date formatting and parsing. It offers a range of functionalities for working with dates, including built-in and custom formats. Let's dive into the different aspects of date formatting in Java, from simple date format in Java to Java date format pattern list.
The DateFormat class serves as the foundation for formatting and parsing dates. It provides methods to convert dates to strings (formatting) and strings to dates (parsing).
Java's DateFormat class is an indispensable tool for formatting and parsing dates. It offers a collection of methods for converting dates to strings (formatting) and strings to dates (parsing) based on specific patterns and formats.
When formatting date Java, you begin with a Date object, which represents a particular moment in time. The DateFormat class offers methods such as 'format()' that accept a Date object as input and convert it to a string representation based on a specified date format pattern. This pattern consists of pattern letters and symbols, which define how the date components should be represented.
For instance, if you have a Date object representing June 3, 2023, and you want to format it as java date format dd/mm/yyyy, you would construct an instance of the DateFormat class and pass the Date object as a parameter to the 'format()' method. This method returns a string representation of the date in the format specified.
On the other hand, when parsing strings into dates, you have a string representation of a date and wish to convert it back into a Date object. The DateFormat class offers methods such as 'parse()' that accept a string and a specified date format pattern as input. The method then converts the string to a Date object by analyzing the supplied pattern and extracting the pertinent date components.
To convert the string "03/06/2023" into a Date object, you would create an instance of the DateFormat class, set the appropriate date format pattern, and call the 'parse()' method with the string as a parameter. The method returns a Date object that represents the specified date.
Using the DateFormat class and its formatting and parsing methods, you can easily convert between Date objects and string representations of dates, enabling you to manipulate dates with flexibility and control in your Java applications. The following formats are possible with date format in Java.
Java provides several built-in date formats for common date representations. Further, if you are wondering how to convert date format in Java, to convert a date to a string, you can utilize the format() method of DateFormat or SimpleDateFormat. Let's take a look at the following example to understand how to use date format in Java and to convert a date to a string:
1. dd/mm/yyyy: Day, month, and year in a two-digit format separated by slashes (e.g., 03/06/2023).
2. eeee date format in Java (mm, dd, yyyy): Full weekday name, full month name, day of the month with a two-digit format, and year (e.g., Sunday, June 03, 2023).
3. yyyy-mm-dd: Year, month, and day in a four-digit year format, hyphen-separated (e.g., 2023-06-03).
Let's explore the usage of DateFormat with some examples:
Output: 03/06/2023
To create a custom date format, you can utilize the SimpleDateFormat class, which extends DateFormat. This class allows you to define patterns using pattern letters and symbols. Here's a Java simple date format example:
Output: Sunday, June 03, 2023
To parse a string and convert it to a date, you can utilize the parse() method of DateFormat or SimpleDateFormat:
Output: Sun Jun 03 00:00:00 UTC 2023
Sometimes, the built-in date formats may not fit your specific requirements. In such cases, you can create custom date formats using SimpleDateFormat. Let's explore an example:
Output: 09:45 AM
The output represents the current time in a 12-hour format with hours, minutes, and AM/PM indications. In this example, the time is 9:45 AM.
When creating custom date formats, you can use pattern letters and symbols to define the desired format. We will now explore the Java date format pattern list. Some commonly used pattern letters include:
- "d" for day of the month
- "M" for month
- "y" for year
- "H" for hour in 24-hour format
- "h" for hour in 12-hour format
- "m" for a minute
- "s" for second
To ensure accurate and efficient date formatting in Java, consider the following best practices:
1. Use appropriate date patterns to represent the desired format accurately.
2. Handle time zones and locale-specific formats appropriately.
3. Validate and handle potential errors during date parsing and formatting operations.
4. Consider using the java.time package (introduced in Java 8) for enhanced date and time functionalities.
To format and parse dates in Java 8 and later versions, the java.time package provides the DateTimeFormatter class. It offers more flexibility and improved thread safety compared to the old SimpleDateFormat class. Here's an example:
Output: 03/06/2023
The java.time package introduced in Java 8 provides a rich set of classes to handle dates and times effectively. It includes classes such as LocalDate, LocalTime, LocalDateTime, and ZonedDateTime. Here's an overview of working with dates using the java.time package:
1. Formatting and parsing dates using the DateTimeFormatter class.
2. Common date operations, such as adding or subtracting days, months, or years.
3. Comparing dates and determining the duration between two dates.
4. Handling time zones and daylight saving time adjustments.
For developers to guarantee precise and consistent date handling in their systems, mastering date formatting in Java is a crucial skill. The fundamental ideas of date formatting in Java have been covered throughout this article, including built-in and customized date formats, pattern letters and symbols, and the DateFormat class for formatting and parsing dates.
Here are some salient points to bear in mind:
1. The foundation for formatting and interpreting dates in Java is the DateFormat class.
2. Formatting entails changing dates into strings in accordance with predefined format patterns.
3. Based on predetermined format patterns, parsing entails converting texts to dates.
4. You may easily construct unique date formats using the SimpleDateFormat class.
5. The Java.time package should be used for improved functionality in Java 8 and later versions, as well as handling time zones and locale-specific formats.
You may master manipulating dates in Java programs by putting the knowledge you learn from this article to use and practicing with various date formatting scenarios. Consider recommended practices, how to handle potential issues, and all the numerous features Java's date and time APIs have to offer.
As you continue to hone your date formatting abilities, you'll gain the assurance necessary to handle dates precisely and consistently in Java projects.
1. How can I change the date format in Java?
In Java, you can change the date format by utilizing the DateFormat or SimpleDateFormat class. Create an instance of the desired date format, and then use the format() method to convert a date to a string with the new format.
2. How do I convert a string to a date in Java?
To convert a string to a date in Java, you can use the parse() method of the DateFormat or SimpleDateFormat class. Create an instance of the desired date format, and then call the parse() method, passing the string as an argument.
3. How can I handle time zones when working with dates in Java?
When working with time zones in Java, consider using the classes from the java.time package, such as ZonedDateTime. These classes provide built-in support for handling time zones and converting dates between different time zones.
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...