ARCHIVE - Computer Science Foundations - Java Discussion

ARCHIVE - drjava output errors

milton13 — Fri, 22 Feb 2008 14:09:35 -0800

I'm having this weird problem with my Pascal Triangle program....the program compiles fine but when i run it and enter the number of rows the interactions pane gives me this:

NullPointerException:
at PascalTri.displayRows(PascalTri.java:30)
at PascalDriver.main(PascalDriver.java:9)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)

ARCHIVE - Owl

garbir21 — Fri, 15 Feb 2008 21:55:04 -0800

Can anyone tell me what the hell is wrong with this Diffy code?

Diffy d = new Diffy (n1, n2, n3, n4);
d.printDiffy();
System.out.println();
while (d.isZero() == false)
{
d.next();
d.printDiffy();
System.out.println();
}

ARCHIVE - Lewis/Loftus code listings

burjam19 — Mon, 04 Feb 2008 23:09:16 -0800

Code listings suspiciously similar to those found in the Lewis and Loftus text are available here:

http://www.cis.uab.edu/ranelli/cs201/Java5Programs/

ARCHIVE - for loops

weissr — Tue, 29 Jan 2008 15:39:20 -0800

for (int i=0; i<n; i++) {

System.out.print("*");

}

What was the question?