Few Java 8 examples to show you how to convert a List of objects into a Map, and how to handle the duplicated keys.

Date: 2019-08-17 View: 1520

A Java 8 example to show you how to convert a Stream to a List via Collectors.toList

Date: 2019-08-17 View: 1520

A Java 8 example to display all the ZoneId and its OffSet hours and minutes.

Date: 2019-08-17 View: 1520

Java examples to show you how to convert a comma-separated String into a List and vice versa.

Date: 2019-08-11 View: 1520

In pom.xml, defined this maven.compiler.source properties to tell Maven to use Java 8 to compile the project.

Date: 2019-08-11 View: 1520

In Java, we can use String.join(",", list) to join a List String with commas.

Date: 2019-08-11 View: 1520

In Java 8, we can use Stream.iterate to create stream values on demand, so called infinite stream.

Date: 2019-08-11 View: 1520

Java Fibonacci examples

Fibonacci number – Every number after the first two is the sum of the two preceding.

Date: 2019-08-11 View: 1520

Few examples to show you how to sort a List with stream.sorted()

Date: 2019-08-11 View: 1520

The key is boxed() the IntStream into a Stream<Integer>, then only convert to an Array.

Date: 2019-08-11 View: 1520

In Java 8, we can use .toArray() to convert a Stream into an Array.

Date: 2019-08-11 View: 1520

Start a Java class and hits this java.lang.UnsupportedClassVersionError, what is class file version 52 56?

Date: 2019-08-11 View: 1520

In the old days, we can use list.toArray(new String[0]) to convert a ArrayList<String> into a String[]

Date: 2019-08-11 View: 1520

Few Java examples to show you how to check if a String is numeric.

Date: 2019-08-11 View: 1520

In Java, we can use new ArrayList<>(Arrays.asList(array)) to convert an Array into an ArrayList

Date: 2019-08-11 View: 1520