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.
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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.
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