How to Iterate list of list of Java Objects using Java 8

How to iterate and get through list of list of objects using Java 8 Also need to get the count of distinct customerIds final List issues = customerIssues.collectList().block(); …

Discrepancies between Java 11 and Java 8 DecimalFormat behaviour

I’ve got a weird issue with Java 11. I’m porting a huge project, and I have some tests which use DecimalFormat failing on the 11 build, but not on the 8 build. DecimalFormat in Java 11 gives me a …

How to iterate over MultipartFile array using Java lambda and streams

Below is my code to upload some file attachments to external storage. I would like to know if there is a way to avoid for loop in the below method to iterate over the MultipartFile[] array so that …

Why use lambda over normal methods?

So suppose my application does lots of repetitive work, for example let’s say my application checks lots of various Lists if they’re empty or not. There are two methods by which I can accomplish this …

Java8 how to get list of objects based on the value [closed]

Code is here order is having shipment and shipment having items and items having product Order Class —————- public class Order { private List shipment; public List&…

Memory Leak Example -references and objects [closed]

I have the below method.Suppose i call A.m1() 10,000 times from class B. So all 10,000 MyObj objects will be garbage collected as their scope is only within the m1() method. There is no memory leak? …

Specific JDK in eclipse.ini for Eclipse IDE version 2020-09 use JDK 15, not default JDK what declared in system environment variable

Eclipse 2020-09, Error: Version 1.8.0_261 of the JVM is not suitable for this product. Version: 11 or greater is required. I must set Java environment to JDK 1.8 for Gradle work correctly in some …

Java 8 find element matching in a list of objects where each object has another object

I have two classes: class SampleClass { private String testString; private List

Is there a Java 8 implementation of a random generator supporting NIST standards?

I am trying to securely generate random numbers. It must support NIST standards, that is NIST SP 800-90A, SP 800-90B, SP 800-90C. I’ve read that Java 9 has an implementation of SecureRandom supporting …

java: Optimizing if statement in Java using Optional [closed]

I have the following code in Java which I need to optimize by the usage of Optional in Java 8: if (x.isEmpty() || x.contains(“<")) { x = "hello1"; } else if (x.contains("...