package CollectionEx;

// we want to use these without typing java.util.ArrayList etc
import java.util.*;

// example of using Lists with comparable classes and comparators
public class ListSortExample {
	

	// example with HCCClasses
	public static void classExample() {
		// set up and fill list of classes
		List<HCCClass> classlist = new ArrayList<>();
		//List<HCCClass> classlist = new LinkedList<>();
		
		classlist.add(new HCCClass("CIS", 214, "Java Programming Language", 4));
		classlist.add(new HCCClass("MATH", 1, "Remedial Counting", 1));
		classlist.add(new HCCClass("BA", 210, "Business Applications", 3));
		classlist.add(new HCCClass("ART", 184, "Goldsmithing", 3));
		classlist.add(new HCCClass("NURS", 101, "Saving Actual Lives", 4));
		classlist.add(new HCCClass("CIS", 102, "Intro to Information Systems", 3));
		
		System.out.println("unsorted " + classlist);
		
		// sort with built-in compareTo, since classlist implements Comparable
		Collections.sort(classlist); 
		System.out.println("sorted " + classlist);
		
		// sort with ClassCreditComparator, which implements Comparator
		ClassCreditComparator compByCredit = new ClassCreditComparator();
		Collections.sort(classlist, compByCredit);
		
                
                Collections.sort(classlist, (a, b) -> a.getCredits() - b.getCredits());
		// more common just to create the comparator inline
		//Collections.sort(classlist, new ClassCreditComparator());
		
		System.out.println("sorted by credits" + classlist);
	}
	
	
	
	// call examples
	public static void main(String[] args) {
		classExample();	
	}

}