我想有一个显示区域和8个按钮。 每个按钮将在显示区域中显示不同的文本。
目前我只有显示区域,但是当我尝试添加A按钮时,按钮与显示区域重叠。 那我怎么能有一个显示区和8个按钮。
JPanel middlePanel = new JPanel ();
middlePanel.setBorder ( new TitledBorder ( new EtchedBorder (), "Display Area" ) );
// create the middle panel components
JTextArea display = new JTextArea ( 16, 58 );
display.setEditable ( false ); // set textArea non-editable
JScrollPane scroll = new JScrollPane ( display );
scroll.setVerticalScrollBarPolicy ( ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS );
//Add Textarea in to middle panel
middlePanel.add ( scroll );
// My code
JFrame frame = new JFrame ();
JFrame btn = new JFrame();
frame.add ( middlePanel );
frame.pack ();
frame.setLocationRelativeTo ( null );
JButton one = new JButton("1");
JPanel panel = new JPanel();
panel.add(one);
//btn.getContentPane().add(BorderLayout.CENTER,panel);
btn.setVisible(true);
frame.setVisible ( true );
答案 0 :(得分:3)
使用两个容器,一个用于文本区域,一个用于按钮,每个容器都有自己的布局管理器......
JPanel middlePanel = new JPanel (new BorderLayout());
middlePanel.setBorder ( new TitledBorder ( new EtchedBorder (), "Display Area" ) );
JTextArea display = new JTextArea ( 16, 58 );
display.setEditable ( false ); // set textArea non-editable
JScrollPane scroll = new JScrollPane ( display );
scroll.setVerticalScrollBarPolicy ( ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS );
middlePanel.add ( scroll );
JPanel buttonPane = new JPanel(); // FlowLayout by default...
buttonPane.add(...); // Add your buttons here...
JFrame frame = new JFrame ();
frame.add ( middlePanel );
frame.add(buttonPane, BorderLayout.SOUTH);
frame.pack ();
frame.setLocationRelativeTo ( null );
frame.setVisible(true);
这通常称为复合布局;)
答案 1 :(得分:0)
JPanel middlePanel = new JPanel ();
middlePanel.setBorder ( new TitledBorder ( new EtchedBorder (), "Display Area" ) );
// create the middle panel components
JTextArea display = new JTextArea ( 16, 58 );
display.setEditable ( false ); // set textArea non-editable
JScrollPane scroll = new JScrollPane ( display );
scroll.setVerticalScrollBarPolicy ( ScrollPaneConstants.VERTICAL_SCROLLBAR_ALWAYS );
//Add Textarea in to middle panel
middlePanel.add ( scroll );
JPanel buttonPane = new JPanel(); // FlowLayout by default...
buttonPane.add(new JButton("1")); // Add your buttons here...
buttonPane.add(new JButton("2"));
buttonPane.add(new JButton("3"));
buttonPane.add(new JButton("4"));
// My code
JFrame frame = new JFrame ();
JFrame btn = new JFrame();
frame.add ( middlePanel );
frame.add(buttonPane,BorderLayout.SOUTH);
frame.pack ();
frame.setLocationRelativeTo ( null );
//btn.getContentPane().add(BorderLayout.CENTER,panel);
btn.setVisible(true);
frame.setVisible ( true );