What are the key features and enhancements introduced in Java 11?

Following are some key new features of Java 11.

1. New methods in String class - Following new methods are added in the String class which help in manipulating String objects and reduce boilerplate code.

• isBlank
• lines
• strip
• stripLeading
• stripTrailing
• repeat

2. Local-Variable Syntax for Lambda Parameters The reserved type name 'var' (local variable syntax) can now be used when declaring the formal parameters of a lambda expression. This enables us to apply modifiers such as type annotations to lambda parameters.

New dafault toArray() method in Collection - A new default method toArray(IntFunction) has been added to the java.util.Collection interface. This method allows the collection's elements to be transferred to a newly created array of a desired runtime type.

String[] strArray = list.toArray(String[]::new)

HttpClient - The new HTTP client introduced in Java 9 which supports HTTP2 is now a standard feature in Java 11.