https://www.novell.com/documentation/extendas35/docs/help/java/jdk/api/javax/swing/MenuElement.html
Java(TM) 2 Platform, Standard Edition, v1.2.2 API Specification: Interface MenuElement
standard editionapi specificationjavatmplatform
https://docs.oracle.com/javase/jp/18/docs/api/java.desktop/javax/swing/MenuElement.html
MenuElement (Java SE 18 & JDK 18)
declaration: module: java.desktop, package: javax.swing, interface: MenuElement
java sejdk