¿Cómo tener subpaneles minimizables?

¿Cómo proporcionar subpaneles minimizables?

ingrese la descripción de la imagen aquí

Como puede ver en la imagen en un panel, hay 4 menús (No sé cuáles son) y son minimizables cuando se hace clic en la flecha al lado de los títulos. No estoy seguro de si este es un componente Swing o fácilmente implementable.

Respuesta 1

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