CODEWITHSUNDEEP
javaswinguser-interfacejframejpanel
user2837858
user2837858

Reputation: 349

Java: How do I move a JLabel to the center of a JPanel?

So in my GUI, I have a JFrame that's a borderlayout. There's a menubar, and some GUI stuff in NORTH and WEST. In CENTER, there is one JLabel. I want it to move to the center (both horizontally and vertically) of the JPanel. How do I do that correctly? I tried box layout and grid layout. One requirement is that I cannot use gridbag layout.

public class NewClass extends JFrame{
    public NewClass () {
        setVisible(true);
        setSize(500,500);
        setDefaultCloseOperation (EXIT_ON_CLOSE);

//menubar
        JMenuBar bar = new JMenuBar();
        JMenu editMenu = new JMenu("Edit");
        JMenuItem mItem = new JMenuItem("Cut"); // edit->cut
        editMenu.add(mItem);
        mItem = new JMenuItem("Copy"); // edit->copy
        editMenu.add(mItem);
        mItem = new JMenuItem("Paste"); // edit->paste
        editMenu.add(mItem);
        bar.add(editMenu);
        this.setJMenuBar(bar);

//north panel
        JPanel topPanel = new JPanel();
        this.add(topPanel,BorderLayout.NORTH);
        JLabel myLabel = new JLabel ("Label:") ;
        topPanel.add(myLabel);
        JButton mytopButton = new JButton ("Push Me");
        topPanel.add(mytopButton);

//left panel
        JPanel leftPanel = new JPanel();
        leftPanel.setBorder (new TitledBorder("Commands:"));
        leftPanel.setLayout (new GridLayout (10,1));
        this.add(leftPanel,BorderLayout.WEST);
        JButton myLeftButton1 = new JButton ("Button 1");
        leftPanel.add(myLeftButton1);
        JButton myLeftButton2 = new JButton ("Button 2");
        leftPanel.add(myLeftButton2);
        JButton myLeftButton3 = new JButton ("Button3");
        leftPanel.add(myLeftButton3);

//center panel
        JPanel centerPanel = new JPanel();
        this.add(centerPanel,BorderLayout.CENTER);
        JLabel mapLabel = new JLabel("Test_String"); //move this to center of JPanel
        centerPanel.add(mapLabel);
        centerPanel.setBorder (new EtchedBorder(Color.black,Color.black));
        centerPanel.setBackground (Color.white);
    }
}

Upvotes: 0

Views: 4265

Answers (3)

user2837858
user2837858

Reputation: 349

Answered. Thanks everyone.

    JPanel centerPanel = new JPanel();
    centerPanel.setLayout (new GridLayout ()); //added
    this.add(centerPanel,BorderLayout.CENTER);
    JLabel mapLabel = new JLabel("Test_String");
    mapLabel.setHorizontalAlignment(SwingConstants.CENTER); //added
    mapLabel.setVerticalAlignment(SwingConstants.CENTER); //added
    centerPanel.add(mapLabel);
    centerPanel.setBorder (new EtchedBorder(Color.black,Color.black));
    centerPanel.setBackground (Color.white);

Upvotes: 1

MadProgrammer
MadProgrammer

Reputation: 347194

Start by taking a look at the JavaDocs for JLabel

Specifically, JLabel#setHorizontalAlignment and JLabel#setVerticalAlignment

Upvotes: 1

camickr
camickr

Reputation: 324108

Check the API for methods that affect the alignment of the component.

There are methods that affect the alignment of the component within the layout manager and others that affect the alignment of the text within the label itself.

Upvotes: 1

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