https://docs.oracle.com/javase/jp/18/docs/api/java.desktop/javax/swing/JInternalFrame.AccessibleJInternalFrame.html
JInternalFrame.AccessibleJInternalFrame (Java SE 18 & JDK 18)
declaration: module: java.desktop, package: javax.swing, class: JInternalFrame, class: AccessibleJInternalFrame
java sejdk