Java

JDK Beta 1995

JDK 1.0 January 1996

JDK 1.1 February 1997

J2SE 1.2 December 1998

J2SE 1.3 May 2000

J2SE 1.4 February 2002

J2SE 5.0 September 2004

Java SE 6 December 2006

Java SE 7 July 2011

Java SE 8 (LTS) March 2014

Java SE 9 September 2017

Java SE 10 March 2018

Java SE 11 (LTS) September 2018

Java SE 12 March 2019

Lambdas work only with functional interfaces—interfaces that define exactly one abstract method.

Each lambda expression has multiple optional and mandatory sections:

■ Parameter type (optional)

■ Parameter name (mandatory)

■ Arrow (mandatory)

■ Curly braces (optional)

■ Keyword return (optional)

■ Lambda body (mandatory)

public interface Validate {

boolean check(Emp emp);

}

Validate validatePerfor = e -> e.getPerformanceRating() >= 5;

Validate validate = (e) -> e.getPerformanceRating() >= 5;

Validate validate = (Emp e) -> e.getPerformanceRating() >= 5;

Validate validate = (e) -> { return (e.getPerformanceRating() >= 5); };

Artigo sobre log

https://stackify.com/java-logging-best-practices/