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What is the difference between ZoneOffset.UTC and ZoneId.of(“UTC”)?

Why does ZonedDateTime now = ZonedDateTime.now(); System.out.println(now.withZoneSameInstant(ZoneOffset.UTC) .equals(now.withZoneSameInstant(ZoneId.of("UTC")))); print out false? I would expect the both ZonedDateTime instances to be equal. 1 Answer ...

June 4, 2022
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Java, Programming

IT Nursery

Can a java lambda have more than 1 parameter?

In Java, is it possible to have a lambda accept multiple different types? I.e: Single variable works: Function <Integer, Integer> adder = i ...

June 3, 2022
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Java, Programming

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Move to next item using Java 8 foreach loop in stream

I have a problem with the stream of Java 8 foreach attempting to move on next item in loop. I cannot set the ...

June 3, 2022
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Java, Programming

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Java 8 forEach with index [duplicate]

This question already has answers here: Is there a concise way to iterate over a stream with indices in Java 8? (23 answers) ...

June 3, 2022
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Java, Programming

IT Nursery

Is it possible to cast a Stream in Java 8?

Is it possible to cast a stream in Java 8? Say I have a list of objects, I can do something like this ...

June 2, 2022
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Java, Programming

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Why is a combiner needed for reduce method that converts type in java 8

I’m having trouble fully understanding the role that the combiner fulfills in Streams reduce method. For example, the following code doesn’t compile: int ...

June 1, 2022
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Java, Programming

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Java 8: Lambda-Streams, Filter by Method with Exception

I have a problem trying out the Lambda expressions of Java 8. Usually it works fine, but now I have methods that throw ...

June 1, 2022
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Java, Programming

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How to add elements of a Java8 stream into an existing List

Javadoc of Collector shows how to collect elements of a stream into a new List. Is there an one-liner that adds the results ...

June 1, 2022
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Java, Programming

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What Java 8 Stream.collect equivalents are available in the standard Kotlin library?

In Java 8, there is Stream.collect which allows aggregations on collections. In Kotlin, this does not exist in the same way, other than ...

May 30, 2022
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Java, Programming

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Java 8 stream reverse order

General question: What’s the proper way to reverse a stream? Assuming that we don’t know what type of elements that stream consists of, ...

May 30, 2022
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