Edit Question - KnowledgeHub

Title Body

I can't get my JFrame from main class to display JPanel from another class. Everything compiles without errors. JFrameTest.java: package jframetest; import java.awt.FlowLayout; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JPanel; public class JFrameTest extends JFrame { public JFrameTest() { FlowLayout mainLayout = new FlowLayout(); setSize(320, 480); setResizable(false); setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); setLayout(mainLayout); JPanel panelMain = new JPanel(mainLayout); JButton testButton = new JButton("Test12"); panelMain.add(testButton); JPanelOne panel = new JPanelOne(); panelMain.add(panel); panel.setVisible(true); add(panelMain); } public static void main(String[] arguments) { JFrameTest frame = new JFrameTest(); frame.setVisible(true); } } JPanelOne.java: package jframetest; import java.awt.FlowLayout; import javax.swing.JButton; import javax.swing.JPanel; public class JPanelOne extends JPanel { public JPanelOne() { FlowLayout layoutPanel = new FlowLayout(); JPanel panel = new JPanel(layoutPanel); JButton button = new JButton("test"); panel.add(button); panel.setVisible(true); } } Is it good practice to keep diffrent JPanels in their own classes? (Example: Wanting to have JFrame contain few same size JPanels, which will be switched by setting setVisible() to true/false) EDIT Thank you for all your answers. Noted. Now back to my question: Now that I know how to add single GUI elements created in other classes I want to know if it is possible to organize elements with layout manager in one of the classes (maybe in some other container than JPanel), so I can

Tags (comma-separated) Cancel