To check if a date of type String is valid or not, you can create a array or a list of date format and iterate through them to check if it is valid or not.
Java Code:package org.code2care.rabbitmq;
import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;
import java.time.format.DateTimeParseException;
public class JavaDateTimeValidator {
public static void main(String[] args) {
String inputDateString1 = "2023-06-23 11:30 AM";
String inputDateString2 = "32-02-2023";
//you can add your valid supported formats
String[] dateFormatPatterns = {
"yyyy/MM/dd", // Example: 2023/06/30
"dd/MM/yyyy", // Example: 23/06/2023
"MM/dd/yyyy", // Example: 06/23/2023
"yyyy-MM-dd HH:mm a", // Example: 2023-06-30 11:30 AM
"dd/MM/yyyy HH:mm:ss", // Example: 23/06/2023 11:30:00
"MM-dd-yyyy", // Example: 06-30-2023
"MMM dd, yyyy HH:mm:ss", // Example: Jun 23, 2023 11:30:00
"dd MMMM yyyy", // Example: 30 June 2023
"hh:mm a", // Example: 11:30 AM/PM
"HH:mm:ss", // Example: 11:30:00
"hh:mm:ss a" // Example: 11:30:00 AM/PM
};
String res1 = validateDateTimeString(inputDateString1, dateFormatPatterns);
String res2 = validateDateTimeString(inputDateString2, dateFormatPatterns);
System.out.println("The inputted date string " + inputDateString1 + " is: " + res1);
System.out.println("The inputted date string " + inputDateString2 + " is: " + res2);
}
public static String validateDateTimeString(String dateTimeStr, String[] dateFormatPatterns) {
for (String datePattern : dateFormatPatterns) {
try {
DateTimeFormatter formatter = DateTimeFormatter.ofPattern(datePattern);
LocalDateTime.parse(dateTimeStr, formatter);
return "valid";
} catch (DateTimeParseException e) {
// just continue
}
}
return "invalid";
}
}
Output:
Facing issues? Have Questions? Post them here! I am happy to answer!
Author Info:
Rakesh (He/Him) has over 14+ years of experience in Web and Application development. He is the author of insightful How-To articles for Code2care.
Follow him on: X
You can also reach out to him via e-mail: rakesh@code2care.org
More Posts related to Java,
- Get the current timestamp in Java
- Java Stream with Multiple Filters Example
- Java SE JDBC with Prepared Statement Parameterized Select Example
- Fix: UnsupportedClassVersionError: Unsupported major.minor version 63.0
- [Fix] Java Exception with Lambda - Cannot invoke because object is null
- 7 deadly java.lang.OutOfMemoryError in Java Programming
- How to Calculate the SHA Hash Value of a File in Java
- Java JDBC Connection with Database using SSL (https) URL
- How to Add/Subtract Days to the Current Date in Java
- Create Nested Directories using Java Code
- Spring Boot: JDBCTemplate BatchUpdate Update Query Example
- What is CA FE BA BE 00 00 00 3D in Java Class Bytecode
- Save Java Object as JSON file using Jackson Library
- Adding Custom ASCII Text Banner in Spring Boot Application
- [Fix] Java: Type argument cannot be of primitive type generics
- List of New Features in Java 11 (JEPs)
- Java: How to Add two Maps with example
- Java JDBC Transition Management using PreparedStatement Examples
- Understanding and Handling NullPointerException in Java: Tips and Tricks for Effective Debugging
- Steps of working with Stored Procedures using JDBCTemplate Spring Boot
- Java 8 java.util.Function and BiFunction Examples
- The Motivation Behind Generics in Java Programming
- Get Current Local Date and Time using Java 8 DateTime API
- Java: Convert Char to ASCII
- Deep Dive: Why avoid java.util.Date and Calendar Classes
More Posts:
- How to submit website to dmoz directory - HowTos
- Java: How to Filter a List using Predicate - Java
- Create Symbolic Link using Terminal Command - MacOS
- Comparator with Lambda Examples - Java
- Convert Java Object to YAML using Jackson Library - Java
- 28: Program to Lowercase a String in Python - Python-Programs
- ActivityManager Warning: Activity not started, its current task has been brought to the front - Android
- Get List of all local branches git command - Git