whatisitform.java

这个是perst-269.zip下面的SOURCECODE,和大家分享了。

import javax.microedition.lcdui.*;

public class WhatIsItForm extends Form implements CommandListener { 
    Guess     midlet;
    TextField animal;
    TextField difference;
    TreeNode  parent;
    NewNodeCallback action;
    
    static final int YES = 0;
    static final int NO = 1;

    WhatIsItForm(Guess midlet, TreeNode parent, NewNodeCallback action) { 
        super("New animal");
        this.midlet = midlet;
        this.action = action;
        this.parent = parent;
        animal = new TextField("What is it", "", 32, TextField.ANY);
        difference = new TextField("What is a difference from others", "", 32, TextField.ANY);
        append(animal);
        append(difference);
        addCommand(Guess.QUIT_CMD);
        addCommand(Guess.DONE_CMD);
        setCommandListener(this);
        Display.getDisplay(midlet).setCurrent(this);
    }
 
    public void commandAction(Command c, Displayable d) 
    {
        if (c == Guess.QUIT_CMD) { 
            midlet.quit();
        } else if (c == Guess.DONE_CMD) { 
            action.callback(new TreeNode(parent, difference.getString(), new TreeNode(null, animal.getString(), null)));
            Display.getDisplay(midlet).setCurrent(midlet.areYouReady);
        }
    }
}