If you have a use case where you always want to return a boolean true value for a function then you can make use of the Java 8 Predicate functional interface in the following way.
Predicate<Object> alwaysTrue = obj -> true;
No matter what you do with this function, this lambda expression will always result as a boolean true.
Example:
package org.code2care.examples;
import java.util.ArrayList;
import java.util.function.Predicate;
public class Example {
public static void main(String[] args) {
Predicate<Object> alwaysTrue = obj -> true;
System.out.println(alwaysTrue.test(100));
System.out.println(alwaysTrue.test("Code2care"));
System.out.println(alwaysTrue.test(new ArrayList<>()));
System.out.println(alwaysTrue.test(null));
}
}
Output:
You can repurpose this same code to work with a case where you always want the result from the predicate to be always false.
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 Open a File with Notepad on Windows 10/11 - Windows-11
- How to change user image icon macOS Big Sur - MacOS
- Resolve - zsh: command not found: code - zsh
- How to add Spring Repository to Maven pom.xml - Java
- Android : Duplicate registration for activity com.example.abc - Android
- PowerShell Concatenate String Examples - Powershell
- Responsive Web Design with CSS Media Queries: A Beginner's Tutorial [Updated for 2023] - CSS
- Send Email using SharePoint PowerShell command, SMTP server - SharePoint