stener-java.awt.event.FocusListener-" title="class or interface in java.awt">addFocusListener</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/awt/Component.html?is-external=true#addHierarchyBoundsListener-java.awt.event.HierarchyBoundsListener-" title="class or interface in java.awt">addHierarchyBoundsListener</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/awt/Component.html?is-external=true#addHierarchyListener-java.awt.event.HierarchyListener-" title="class or interface in java.