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POHow to set the size of a gridlayout jpanel
 

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  1. POHow to set the size of a gridlayout jpanel
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    <p>I'm trying to set the size of a gridlayout jpanel. Here is the code:</p> <pre><code>JFrame myFrame = new JFrame(); myFrame.setLayout(new FlowLayout()); myFrame.setLocation(400, 100); myFrame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); JLabel jlMins = new JLabel("Number of minutes for tutoring session (should be a positive decimal number): 0.0"); JLabel jlEarnings = new JLabel("Earnings in dollars and cents received (should be positive decimal number): 0.0"); jtfMins = new JTextField(20); jtfEarnings = new JTextField(20); JPanel jpMins = new JPanel(new BorderLayout()); JPanel jpEarnings = new JPanel(new BorderLayout()); jpMins.setPreferredSize(new Dimension(300,50)); jpEarnings.setPreferredSize(new Dimension(300,50)); jpMins.add(jlMins,BorderLayout.NORTH); jpMins.add(jtfMins,BorderLayout.CENTER); jpEarnings.add(jlEarnings,BorderLayout.NORTH); jpEarnings.add(jtfEarnings,BorderLayout.CENTER); JButton jbQuit = new JButton("Quit"); JButton jbEnter = new JButton("Enter"); JButton jbReport = new JButton("Run Report"); jbQuit.setActionCommand("quit"); jbEnter.setActionCommand("enter"); jbReport.setActionCommand("report"); jbQuit.addActionListener(this); jbEnter.addActionListener(this); jbReport.addActionListener(this); JPanel jpButtons = new JPanel(new GridLayout(4,1,0,20)); jpButtons.setSize(new Dimension(50,150)); jpButtons.add(jbEnter); jpButtons.add(jbReport); jpButtons.add(jbQuit); JPanel jpNorth = new JPanel(new BorderLayout()); jpNorth.add(jpMins,BorderLayout.NORTH); jpNorth.add(jpEarnings,BorderLayout.CENTER); jpNorth.add(jpButtons,BorderLayout.SOUTH); jtaReports = new JTextArea(); jtaReports.setColumns(40); jtaReports.setRows(10); jtaReports.setLineWrap(true); JScrollPane jspReports = new JScrollPane(jtaReports); jspReports.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS); JPanel jpSouth = new JPanel(); jpSouth.setPreferredSize(new Dimension(350,200)); jpSouth.add(jspReports); JPanel jpMain = new JPanel(new BorderLayout()); jpMain.add(jpNorth,BorderLayout.NORTH); jpMain.add(jpSouth,BorderLayout.SOUTH); jpMain.setPreferredSize(new Dimension(500,500)); myFrame.setContentPane(jpMain); myFrame.pack(); myFrame.setVisible(true); </code></pre> <p>The panel name is jpButtons. Of the above code I'm talking mainly about this section:</p> <pre><code> JButton jbQuit = new JButton("Quit"); JButton jbEnter = new JButton("Enter"); JButton jbReport = new JButton("Run Report"); jbQuit.setActionCommand("quit"); jbEnter.setActionCommand("enter"); jbReport.setActionCommand("report"); jbQuit.addActionListener(this); jbEnter.addActionListener(this); jbReport.addActionListener(this); JPanel jpButtons = new JPanel(new GridLayout(4,1,0,20)); jpButtons.setSize(new Dimension(50,150)); jpButtons.add(jbEnter); jpButtons.add(jbReport); jpButtons.add(jbQuit); </code></pre> <p>How exactly does setSize, and setPreferredSize work or how to get them to work properly on jpanel, components, etc.</p>
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    1. COMan, your code suffers seriously from [Type Embedded in Name](http://www.codinghorror.com/blog/2006/05/code-smells.html)
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