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Thread: Output in applet keeps painting over the top of itself

  1. #1
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    Default Output in applet keeps painting over the top of itself

    This code is for a java applet, and you enter a word, hit the enter key, then click a check box and then the answer will output just below the check box, if you enter a word, hit the enter key, then choose a checkbox, the word will paint, if you then enter a different word it will the output will go over that first word, how can I fix that so that the first answer disappears?
    import java.awt.*;
    import java.applet.*;
    import java.awt.event.*;
     
    public class MiniCode extends Applet implements KeyListener, ItemListener {
     
    TextField OriginalText;
    String EnteredVerb;
    boolean PoliteForm, PoliteForm2, PolitePast, PolitePast2;
    int len;
    Checkbox checkbox1, checkbox2, checkbox3 ,checkbox4, checkbox5;
     
    public void init() {
    setLayout (null);
    OriginalText = new TextField();
    OriginalText.setBounds(200, 200, 100,35);
    add(OriginalText);
    OriginalText.addKeyListener(this);
     
    checkbox1 = new Checkbox("polite form present");
    checkbox1.setBounds(350,180,130,35);
    checkbox1.addItemListener(this);
    add(checkbox1);
     
    checkbox2 = new Checkbox("polite form past");
    checkbox2.setBounds(350,230,130,35);
    checkbox2.addItemListener(this);
    add(checkbox2);
     
    }
     
    public void itemStateChanged(ItemEvent e) {
    len = EnteredVerb.length();
     
    if (e.getSource() == checkbox1) {
    if (EnteredVerb.endsWith("iru") || EnteredVerb.endsWith("eru")){
    PoliteForm = true;
    repaint();
    }
     
    else if (EnteredVerb.endsWith("u")){
    PoliteForm2 = true; 
    repaint();
    }
    }
     
    if (e.getSource() == checkbox2){
    if (EnteredVerb.endsWith("iru") || EnteredVerb.endsWith("eru")){
    PolitePast = true;
    repaint();
    }
     
    else if (EnteredVerb.endsWith("u")){
    PolitePast2 = true;
    repaint();
    }
    }
    } 
     
    public void keyPressed(KeyEvent e) {
    if (e.getKeyCode() == KeyEvent.VK_ENTER)
    {
    EnteredVerb = OriginalText.getText();
    }
    this.repaint(); //request a repaint
    }//end KeyPressed()
     
    public void paint(Graphics g)
    {
    if (PoliteForm)
    {
    g.drawString(EnteredVerb.substring(0… -2)) + "masu", 250,300);
    }
     
    if (PoliteForm2)
    {
    g.drawString(EnteredVerb.substring(0… -1)) + "imasu", 250, 300);
    }
     
    if (PolitePast)
    {
    g.drawString(EnteredVerb.substring(0… -2)) + "mashita", 250,300);
    }
     
    if (PolitePast2)
    {
    g.drawString(EnteredVerb.substring(0… -1)) + "imashita", 250, 300);
    }
    }//end paint()
     
    public void keyReleased(KeyEvent e) { }
     
     
    public void keyTyped(KeyEvent e) { }
     
    }//end class


  2. #2
    Administrator copeg's Avatar
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    Default Re: Output in applet keeps painting over the top of itself

    Calls super.paint(g) to have the parent class clear the component. And for what its worth, I encourage you to use Swing rather than AWT (Swing components start with 'J', so JApplet, JPanel, etc...and should you do so override the paintComponent method as opposed to paint).

    Edit: And do not post a question multiple times to the forums. I have deleted your other post.

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