Thread: Problem with border in program

Hi,
I am working on a program that is meant to demonstrate all the different borders that can be applied to a JComponent (a JLabel in this case). The program is an example from the text book I am using. When I compile the program I get the following errors:

C:\J21work>javac BorderDemo.java
BorderDemo.java:142: incompatible types
found : javax.swing.border.EmptyBorder
required: Border
Border border = new EmptyBorder(2, 2, 2, 2);
^
BorderDemo.java:145: incompatible types
found : javax.swing.border.BevelBorder
required: Border
border = new BevelBorder(BevelBorder.LOWERED);
^
BorderDemo.java:149: incompatible types
found : javax.swing.border.BevelBorder
required: Border
border = new BevelBorder(BevelBorder.RAISED);
^
BorderDemo.java:153: incompatible types
found : javax.swing.border.EtchedBorder
required: Border
border = new EtchedBorder();
^
BorderDemo.java:157: incompatible types
found : javax.swing.border.LineBorder
required: Border
border = new LineBorder(Color.black, 5);
^
BorderDemo.java:161: incompatible types
found : javax.swing.border.MatteBorder
required: Border
border = new MatteBorder(15, 15, 15, 15,
^
BorderDemo.java:167: incompatible types
found : javax.swing.border.EmptyBorder
required: Border
border = new EmptyBorder(2, 2, 2, 2);
^
BorderDemo.java:197: setBorder(javax.swing.border.Border) in javax.swing.border.
TitledBorder cannot be applied to (Border)
jLabel1Border.setBorder(border);
^
BorderDemo.java:203: setBorder(javax.swing.border.Border) in javax.swing.JCompon
ent cannot be applied to (Border)
jLabel1.setBorder(border);
^
9 errors

Here is the code.

import java.awt.*;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import javax.swing.*;
import javax.swing.border.*;
 
public class BorderDemo extends JApplet {
  // Declare a label for displaying message
  private JLabel jLabel1 = new JLabel("Display the border type",
    JLabel.CENTER);
 
  // A check box for selecting a border with or without a title
  private JCheckBox jchkTitled;
 
  // Radio buttons for border styles
  private JRadioButton jrbLoweredBevel, jrbRaisedBevel,
    jrbEtched, jrbLine, jrbMatte, jrbEmpty;
 
  // Radio buttons for titled border options
  private JRadioButton jrbAboveBottom, jrbBottom,
    jrbBelowBottom, jrbAboveTop, jrbTop, jrbBelowTop,
    jrbLeft, jrbCenter, jrbRight;
 
  // TitledBorder for the label
  private TitledBorder jLabel1Border;
 
  /** Constructor */
  public BorderDemo() {
    // Create a JLabel instance and set colors
    jLabel1.setBackground(Color.yellow);
    jLabel1.setBorder(jLabel1Border);
 
    // Place title position radio buttons
    JPanel jpPosition = new JPanel();
    jpPosition.setLayout(new GridLayout(3, 2));
    jpPosition.add(
      jrbAboveBottom = new JRadioButton("ABOVE_BOTTOM"));
    jpPosition.add(jrbAboveTop = new JRadioButton("ABOVE_TOP"));
    jpPosition.add(jrbBottom = new JRadioButton("BOTTOM"));
    jpPosition.add(jrbTop = new JRadioButton("TOP"));
    jpPosition.add(
      jrbBelowBottom = new JRadioButton("BELOW_BOTTOM"));
    jpPosition.add(jrbBelowTop = new JRadioButton("BELOW_TOP"));
    jpPosition.setBorder(new TitledBorder("Position"));
 
    // Place title justification radio buttons
    JPanel jpJustification = new JPanel();
    jpJustification.setLayout(new GridLayout(3,1));
    jpJustification.add(jrbLeft = new JRadioButton("LEFT"));
    jpJustification.add(jrbCenter = new JRadioButton("CENTER"));
    jpJustification.add(jrbRight = new JRadioButton("RIGHT"));
    jpJustification.setBorder(new TitledBorder("Justification"));
 
    // Create panel jpTitleOptions to hold jpPosition and
    // jpJustification
    JPanel jpTitleOptions = new JPanel();
    jpTitleOptions.setLayout(new BorderLayout());
    jpTitleOptions.add(jpPosition, BorderLayout.CENTER);
    jpTitleOptions.add(jpJustification, BorderLayout.EAST);
 
    // Create Panel jpTitle to hold a check box and title position
    // radio buttons, and title justification radio buttons
    JPanel jpTitle = new JPanel();
    jpTitle.setBorder(new TitledBorder("Border Title"));
    jpTitle.setLayout(new BorderLayout());
    jpTitle.add(jchkTitled = new JCheckBox("Titled"),
      BorderLayout.NORTH);
    jpTitle.add(jpTitleOptions, BorderLayout.CENTER);
 
    // Group radio buttons for title position
    ButtonGroup btgTitlePosition = new ButtonGroup();
    btgTitlePosition.add(jrbAboveBottom);
    btgTitlePosition.add(jrbBottom);
    btgTitlePosition.add(jrbBelowBottom);
    btgTitlePosition.add(jrbAboveTop);
    btgTitlePosition.add(jrbTop);
    btgTitlePosition.add(jrbBelowTop);
 
    // Group radio buttons for title justification
    ButtonGroup btgTitleJustification = new ButtonGroup();
    btgTitleJustification.add(jrbLeft);
    btgTitleJustification.add(jrbCenter);
    btgTitleJustification.add(jrbRight);
 
    // Create Panel jpBorderStyle to hold border style radio buttons
    JPanel jpBorderStyle = new JPanel();
    jpBorderStyle.setBorder(new TitledBorder("Border Style"));
    jpBorderStyle.setLayout(new GridLayout(6, 1));
    jpBorderStyle.add(jrbLoweredBevel =
      new JRadioButton("Lowered Bevel"));
    jpBorderStyle.add(jrbRaisedBevel =
      new JRadioButton("Raised Bevel"));
    jpBorderStyle.add(jrbEtched = new JRadioButton("Etched"));
    jpBorderStyle.add(jrbLine = new JRadioButton("Line"));
    jpBorderStyle.add(jrbMatte = new JRadioButton("Matte"));
    jpBorderStyle.add(jrbEmpty = new JRadioButton("Empty"));
 
    // Group radio buttons for border styles
    ButtonGroup btgBorderStyle = new ButtonGroup();
    btgBorderStyle.add(jrbLoweredBevel);
    btgBorderStyle.add(jrbRaisedBevel);
    btgBorderStyle.add(jrbEtched);
    btgBorderStyle.add(jrbLine);
    btgBorderStyle.add(jrbMatte);
    btgBorderStyle.add(jrbEmpty);
 
    // Create Panel jpAllChoices to place jpTitle and jpBorderStyle
    JPanel jpAllChoices = new JPanel();
    jpAllChoices.setLayout(new BorderLayout());
    jpAllChoices.add(jpTitle, BorderLayout.CENTER);
    jpAllChoices.add(jpBorderStyle, BorderLayout.EAST);
 
    // Place panels in the frame
    setLayout(new BorderLayout());
    add(jLabel1, BorderLayout.CENTER);
    add(jpAllChoices, BorderLayout.SOUTH);
 
    // Register listeners
    ActionListener listener = new EventListener();
    jchkTitled.addActionListener(listener);
    jrbAboveBottom.addActionListener(listener);
    jrbBottom.addActionListener(listener);
    jrbBelowBottom.addActionListener(listener);
    jrbAboveTop.addActionListener(listener);
    jrbTop.addActionListener(listener);
    jrbBelowTop.addActionListener(listener);
    jrbLeft.addActionListener(listener);
    jrbCenter.addActionListener(listener);
    jrbRight.addActionListener(listener);
    jrbLoweredBevel.addActionListener(listener);
    jrbRaisedBevel.addActionListener(listener);
    jrbLine.addActionListener(listener);
    jrbEtched.addActionListener(listener);
    jrbMatte.addActionListener(listener);
    jrbEmpty.addActionListener(listener);
  }
 
  private class EventListener implements ActionListener {
    /** Handle ActionEvents on check box and radio buttons */
    public void actionPerformed(ActionEvent e) {
      // Get border style
      Border border =  new EmptyBorder(2, 2, 2, 2);
 
      if (jrbLoweredBevel.isSelected()) {
        border =  new BevelBorder(BevelBorder.LOWERED);
        jLabel1.setText("Lowered Bevel Style");
      }
      else if (jrbRaisedBevel.isSelected()) {
        border = new BevelBorder(BevelBorder.RAISED);
        jLabel1.setText("Raised Bevel Style");
      }
      else if (jrbEtched.isSelected()) {
        border = new EtchedBorder();
        jLabel1.setText("Etched Style");
      }
      else if (jrbLine.isSelected()) {
        border = new LineBorder(Color.black, 5);
        jLabel1.setText("Line Style");
      }
      else if (jrbMatte.isSelected()) {
        border = new MatteBorder(15, 15, 15, 15,
          new ImageIcon(getClass().getResource
            ("/image/caIcon.gif")));
        jLabel1.setText("Matte Style");
      }
      else if (jrbEmpty.isSelected()) {
        border = new EmptyBorder(2, 2, 2, 2);
        jLabel1.setText("Empty Style");
      }
 
      if (jchkTitled.isSelected()) {
        // Get the title position and justification
        int titlePosition = TitledBorder.DEFAULT_POSITION;
        int titleJustification = TitledBorder.DEFAULT_JUSTIFICATION;
 
        if (jrbAboveBottom.isSelected())
          titlePosition = TitledBorder.ABOVE_BOTTOM;
        else if (jrbBottom.isSelected())
          titlePosition = TitledBorder.BOTTOM;
        else if (jrbBelowBottom.isSelected())
          titlePosition = TitledBorder.BELOW_BOTTOM;
        else if (jrbAboveTop.isSelected())
          titlePosition = TitledBorder.ABOVE_TOP;
        else if (jrbTop.isSelected())
          titlePosition = TitledBorder.TOP;
        else if (jrbBelowTop.isSelected())
          titlePosition = TitledBorder.BELOW_TOP;
 
        if (jrbLeft.isSelected())
          titleJustification = TitledBorder.LEFT;
        else if (jrbCenter.isSelected())
          titleJustification = TitledBorder.CENTER;
        else if (jrbRight.isSelected())
          titleJustification = TitledBorder.RIGHT;
 
        jLabel1Border = new TitledBorder("A Title");
        jLabel1Border.setBorder(border);
        jLabel1Border.setTitlePosition(titlePosition);
        jLabel1Border.setTitleJustification(titleJustification);
        jLabel1.setBorder(jLabel1Border);
      }
      else {
        jLabel1.setBorder(border);
      }
    }
  }
 
  public static void main(String[] args) {
    BorderDemo applet = new BorderDemo();
    JFrame frame = new JFrame();
    //EXIT_ON_CLOSE == 3
    frame.setDefaultCloseOperation(3);
    frame.setTitle("BorderDemo");
    frame.getContentPane().add(applet, BorderLayout.CENTER);
    applet.init();
    applet.start();
    frame.setSize(400,320);
    frame.setLocationRelativeTo(null);
    frame.setVisible(true);
  }
}

I thought that since the border classes used each extend AbstractBorder which implements Border there shouldn't be a compatibility issue since they are all instances of the border interface. How do I fix this?

Thanks for any help,
Casey

Originally Posted by KevinWorkman

Your program works fine for me. Try clearing out any old versions of compiled classes?

Also, for future reference, you should post your programs in SSCCE form- there's really no need to post your entire program. Narrow it down to as little code as possible- in your case, a single component with a border should do the trick. Although your problem seems to be in your environment, so it's a bit of a moot point here.

That was it. I had another class named in Border in the same directory as BorderDemo. Thanks.