JCreator and ACM NullPointerException - Help!

[Eranga]

Hmm, did you try a simple code in your IDE, just print hello world, apart from all of these.

[ajiboye.tayo]

I downloaded another one from the same site (Lord knows what's wrong with them, even though it seems to have been updated only years ago). It's working now. Thanks a lot.

In spite of that, I still have a problem with using GOval. The following code gives me errors:

import acm.graphics.*;
import acm.program.*;
import java.awt.*;

public class GRectPlusGOval extends GraphicsProgram
{
	public void run()
	{
		GRect rect = new GRect(100, 50, 125, 60);
		rect.setFilled(true);
		rect.setColor(Color.RED);
		add(rect);
		
		GOval oval = new GOval(100, 50, 125, 60);
		oval.setFilled(true);
		oval.setFillColor(Color.GREEN);
		add(oval);
	}
}

Again, I typed it out from a textbook. Taking out the GOval part, leaving only the GRect runs correctly, as in:

import acm.graphics.*;
import acm.program.*;
import java.awt.*;

public class GRectExample extends GraphicsProgram
{
	public void run()
	{
		GRect rect = new GRect(100, 50, 125, 60);
		rect.setFilled(true);
		rect.setColor(Color.RED);
		add(rect);
	}
}

Build Output:

--------------------Configuration: <Default>--------------------
acm\graphics\GOval.java(acm\graphics:GOval.java):4 61: cannot find symbol
symbol : class ArcRenderer
location: class acm.graphics.GOval
private ArcRenderer renderer;
^
acm\graphics\GOval.java(acm\graphics:GOval.java):6 2: cannot find symbol
symbol : class ArcRenderer
location: class acm.graphics.GOval
renderer = new ArcRenderer(this);
^
2 errors

Process completed.

General Output:

--------------------Configuration: <Default>--------------------
java.lang.NoClassDefFoundError: GRectPlusGOval
Caused by: java.lang.ClassNotFoundException: GRectPlusGOval
at java.net.URLClassLoader$1.run(URLClassLoader.java: 202)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.j ava:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:3 07)
at sun.misc.Launcher$AppClassLoader.loadClass(Launche r.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:2 48)
Could not find the main class: GRectPlusGOval. Program will exit.
Exception in thread "main"
Process completed.

Thanks.

[Norm]

java.lang.NoClassDefFoundError: GRectPlusGOval

That's the name of your class isn't it?

Is there a .class file with that name in the current folder when you issue the java command?

[Eranga]

And seems some the variables are not define.