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3 Απρ 2013 · You should only use a JFrame or JDialog (or other top level container) to display other containers (like JPanel). You should endeavor to use JPanel as your base line container for all your forms, nesting other panels and controls into as you see fit.
24 Αυγ 2012 · There is no need to make a class extends JPanel, and contain a JPanel; if a class extends JPanel, to get the JPanel instance, simply use this (so addLabel would instead do this.setLayout (blah)). But of course there is no need to even subclass JPanel for something as simple as adding a JLabel.
15 Απρ 2021 · JLabel (String s, Icon i, int align) : creates a new label with a string, an image and a specified horizontal alignment. Commonly used methods of the class are : getIcon () : returns the image that the label displays. setIcon (Icon i) : sets the icon that the label will display to image i.
How to Use Labels. With the JLabel class, you can display unselectable text and images. If you need to create a component that displays a string, an image, or both, you can do so by using or extending JLabel. If the component is interactive and has a certain state, use a button instead of a label.
10 Ιουλ 2024 · In this chapter we use JFrame, JButton, and JLabel components. JFrame is is a top-level window with a title and a border. It is used to organize other components, commonly referred to as child components. JButton is a push button used to perform an action.
How to Use Panels. The JPanel class provides general-purpose containers for lightweight components. By default, panels do not add colors to anything except their own background; however, you can easily add borders to them and otherwise customize their painting. Details can be found in Performing Custom Painting.
10 Μαρ 2023 · Both JPanel and JFrame are classes available in the JAVA language. JPanel is a simple container class whose parent is a JComponent class whereas JFrame is a container whose parent is java.awt.Frame class.
