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  #1 (permalink)  
Old 06-10-2007, 04:30 PM
DaViD's Avatar
DaViD DaViD is offline
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Is there any bug in the Java program code below ? If yes, how do I correct it ?

import java.awt.*;

import java.applet.*;

import MyClass;



public class Applet19 extends Applet

{

MyClass myObject;

TextField textField1;



public void init()

{

myObject = new MyClass(1);

textField1 = new TextField(10);

add(textField1);

textField1.setText("1");

}



public void paint(Graphics g)

{

String s = textField1.getText();

int value = Integer.parseInt(s);

myObject.SetField(value);

value = myObject.GetField();

s = String.valueOf(value);

g.drawString("The data field of the object", 30, 80);

g.drawString("is now set to this value:", 40, 95);

g.drawString(s, 90, 125);

}



public boolean action(Event event, Object arg)

{

repaint();

return true;

}

}



when i compile it, i get error message :
Appleta.java:5: ' . ' expected
import MyClass;
^

the code for MyClass is :

class MyClass

{

private int myField;



public MyClass(int value)

{

myField = value;

}



public void SetField(int value)

{

myField = value;

}



public int GetField()

{

return myField;

}

}

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  #2 (permalink)  
Old 06-10-2007, 04:30 PM
mypublicident
Posts: n/a
ditto:

You can set a package for MyClass (recommended). Or you can include your path on your command line for the compiler (in which case comment out your import statement as Foxy points out):

# mostly works:
$ javac -cp . Applet19.java


I say mostly works because when I compiled it, you seem to be using deprecated code. A tweak of the command line reveals that:

$ javac -cp . -Xlint:deprecation Applet19.java
Applet19.java:32: warning: [deprecation] action(java.awt.Event,java.lang.Object) in java.awt.Component has been deprecated
public boolean action(Event event, Object arg)
^
1 warning



Here is any more info just in case my deprecated comment is out of date:
$ java -version
java version "1.5.0_02"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.5.0_02-b09)
Java HotSpot(TM) Client VM (build 1.5.0_02-b09, mixed mode, sharing)

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  #3 (permalink)  
Old 06-10-2007, 04:30 PM
theFOX ®
Posts: n/a
It seems you are using the default package. When using the default package, or whenever the class that you want to use is in the same package as the other class, then you shouldn't import it.

Hence, simply remove the import MyClass; statement.

BTW, in java world, the use of the default package is discouraged. It will cause some troubles; for example, if you want to use some classes located at the default package from another class inside another package, you won't be able to import those classes from the default package.

Enjoy!


EDIT

I forgot to tell you that the reason of the error by the compiler, is that it expected an inner class. For example, if the MyClass has an inner class or something, then you will have to write import MyClass.MyInnerClass; Another reason could be from the fact that you cannot import default package classes, the complier thought MyClass to be a package.

Thanks.

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