Thread: Help with main method TestCase.java

Hello GregBrannon,

I'm very sorry, I didn't see the guidelines.

[highlight=java] import java.util.Comparator;
import java.util.Iterator;
import java.util.List;
 
public class TestCase {
 
SomeHelperClass someHelperClass = new SomeHelperClass();
 
public static void main(String[] args) {
 
TestCase testCase = new TestCase(); [/highlight]
 
The highlighted codes, I do understand. 
 
 
try {
testCase.getAll();
} catch (Exception e) {
} finally {
testCase = null;
}
 
}
 
public void getAll() throws SystemException {
 
List list = null;
 
list = someHelperClass.getFigures();
if (list.get(0) != null) {
if (list.get(0) instanceof Triangle) {
Triangle t1 = (Triangle) list.get(0);
t1.setBase(1);
t1.setHeight(1);
} else if (list.get(0) instanceof Square) {
Square s1 = (Square) list.get(0);
s1.setBase(1);
}
 
} else {
throw new SystemException("Empty list");
}
 
FigureComparator comparator = new FigureComparator();
sortList(list, 1, comparator);
 
Iterator iter = list.iterator();
while (iter.hasNext()) {
Figure figure = (Figure) iter.next();
figure.print();
}
 
}
 
 
public List sortList(List list, int sortChoise, Comparator comparator) {
 
switch (sortChoise) {
 
case 1:
someHelperClass.sort(list, 1, comparator);
break;
 
default:
someHelperClass.sort(list, 2, comparator);
break;
 
case 2:
someHelperClass.sort(list, 2, comparator);
 
case 3:
someHelperClass.sort(list, 3, comparator);
break;
}
 
return list;
}
 
}

Does anyone know why SystemException is used in this case, because eclipse underlines it with red color with the text "SystemException cannot be resolved to a type" meaning something is wrong in the syntax? And why is the list = null? Shouldn't it contain some kind of value?

I wonder what the function for sortChoise is, and the difference between the cases & default is? Is it for the comparator to compare the cases with the default?

I know it's a couple of questions, but I've really tried to understand it on my own but to no avail. I would appreciate all help. Thanks in advance, and hopefully I posted my question and the codes correctly and more organized.

Please edit your post and wrap your code with code tags:
[code=java]
YOUR CODE HERE
[/code]
to get highlighting and preserve formatting.

Also make sure the statements' indentations are preserved.

the function for sortChoise

Read about switch statements and how they work:
http://docs.oracle.com/javase/tutori...ts/switch.html

If you've gotten your answer, please mark this thread as solved.