Hello, i am using JCreator, for writing my J2ME program, after building the program, it keeps on given me the following errors:

package javax.microedition.midlet does not exist
package javax.microedition.lcdui does not exist
package javax.microedition.io does not exist
package javax.microedition.io does not exist
cannot find symbol
cannot find symbol
cannot find symbol class Form
cannot find symbol class Display
cannot find symbol class TextField
cannot find symbol class Ticker
cannot find symbol class StringItem
cannot find symbol class Command
cannot find symbol class Image
cannot find symbol class ChoiceGroup
cannot find symbol class DateField
cannot find symbol class Alert
cannot find symbol class Image
cannot find symbol class Command
cannot find symbol class Displayable
cannot find symbol variable Display
cannot find symbol class StringItem
cannot find symbol class Form
cannot find symbol class TextField
cannot find symbol variable TextField
cannot find symbol class TextField
cannot find symbol variable TextField

please help me out