Along with lambdas, Java SE 8 brought method references to the Java language. This tutorial offers a brief overview of method references in Java, then gets you started using them with Java code ...

A callback operation in Java is one function that is passed to another function and executed after some action is completed. A callback can be executed either synchronously or asynchronously. In the ...

private メソッドは Java 9 以降で許されておるが、それは 実装を持つ補助的なメソッドのみ。 abstract と private は矛盾！ abstract は「継承先で実装せよ」、private は「外から見えぬ」、よって意味が通らぬ。 final メソッドをインタフェースに書くことは不可。

One day, there will be a full increment release of Java, and when that two-point-oh version becomes official, I am desperately hoping they will include a fully implemented toString() method in the ...

While it seems so basic that it wouldn't require a mention, there's a basic and often violated software design principle pertaining to Java method modifiers that is in need of explanation. A public ...