I have strings in a list and through only using the stream api I was settings all strings to lowercase, sorting them from smallest string to largest and printing them. The issue I'm having is capitalizing the first letter of the string. Is that something I do through .stream().map()?
This question already has an answer here:I have the following code. Sonar is complaining replace this lambda with a method reference.
I have a BigDecimal amount that I want to cast to Long if it is not null, but I got a java.lang.NullPointerException exception doing:
This question already has an answer here:Why does the following condition return true with JDK 8, whereas it returns false with JDK 9?
I have a list of locations returned by Google places API and decided to find a Place with a lowest price.
I'm completely new to Java 8 and I'm trying to wrap my head around why the last test is false.Output:
In the implementation details of HashMap, I can read:If I have constant hashCode and fine equals and my class doesn't implement Comparable how exactly it will break the ties and how the tree will be constructed?
This is the implementation of map() method:When I call map() like this, what is the type of T and U? What is the type of wildcard (?)? It is very confusing.
How to find the first match or the last element in a list using java stream?Which means if no element matches the condition，then return the last element.
I've an object,I want to convert this customData Map in the List of object1 into one single map, I am ok with over-writing the values if the key already exists.