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Thread: Combobox problem

  1. #1
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    Default Combobox problem

    Hello,

    My idea is to create a drop down menu from where I can choose between a few fonts and font styles.

    Here is the code which I use:

    import java.awt.event.*;
    import java.awt.*;
    import java.applet.*;
    import java.io.*;
    import javax.swing.*; 
    import javax.swing.text.*;
    import java.util.*;
    import java.awt.Font;
    import java.awt.Font;
    import java.awt.event.ActionEvent;
    import java.awt.event.ActionListener;
     
     
    import javax.swing.JComboBox;
    import javax.swing.JFrame;
    import javax.swing.JLabel;
    import javax.swing.JPanel;
     
     
    public class appleted extends Applet implements ActionListener
    {
    TextArea t;
     
    Button copy,cut,paste;
    // String[] description = { "Courier", "Sans Serif",
        //"Monospaced","Symbol" };
     
    String selection;
     
      private JComboBox fontComboBox;
      public void FontComboBox() 
      {
       // setTitle("ComboBoxTest");
       // setSize(300, 200);
        //fontComboBox.addActionListener(this);
     
     
     
       /* JPanel p = new JPanel();
        p.add(fontComboBox);
        getContentPane().add(p, "North");
        getContentPane().add(fontLabel, "Center");*/
    this.validate();
      }
     
    public void init()
    {
       setBackground(Color.white);
    t=new TextArea(10,40);
    add(t);
     
     
    copy=new Button("copy");
    add(copy);
    copy.addActionListener(this);
     
    cut=new Button("cut");
    add(cut);
    cut.addActionListener(this);
     
    paste=new Button("paste");
    add(paste);
    paste.addActionListener(this);
     
    fontComboBox = new JComboBox();
        fontComboBox.setEditable(true);
        fontComboBox.addItem("Serif");
        fontComboBox.addItem("SansSerif");
        fontComboBox.addItem("Monospaced");
        fontComboBox.addItem("Dialog");
        fontComboBox.addItem("DialogInput");
        fontComboBox.addActionListener(this);
    this.validate();
     
    }
    public void actionPerformed(ActionEvent e)
    {
    if(e.getSource()==cut) cutAction();
    else if (e.getSource()==copy) copyAction();
    else if (e.getSource()==paste) pasteAction();
    this.validate();
    }
    private void copyAction()
    {
    selection=t.getSelectedText();
    }
    private void cutAction()
    {
    int start=t.getSelectionStart(),
    end=t.getSelectionEnd();
    selection=t.getSelectedText();
    t.replaceRange("",start,end);
    t.setSelectionEnd(start);
    }
    private void pasteAction()
    {
    int start=t.getSelectionStart(),
    end=t.getSelectionEnd();
    t.replaceRange(selection,start,end);
    }
     
    }

    Then I include the java applet into a html page. The problem is that the menu for changing the font and its style never show up altough the compiler says no errors.

    Can somebody help me?

    Thank you very much in advance.
    Last edited by Norm; April 4th, 2013 at 09:02 AM. Reason: Change quote to code tags


  2. #2
    Super Moderator Norm's Avatar
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    Default Re: Combobox problem

    Please edit the code in the post and give it proper formatting. It has too many statements starting in the first column. Statements within {}s should be indented 3-4 spaces to show nesting levels and make the code easier to read and understand.
    If you don't understand my answer, don't ignore it, ask a question.

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