/* Demonstration of how to:
    - have 1 file with multiple classes
	- use Comparable to sort an ArrayList of objects
*/

import java.util.ArrayList;

class FooBar implements Comparable <FooBar> {
	int foo;
	int bar;
	FooBar() {
		foo = 0;
		bar = 1;
	}
	
	FooBar(int x, int y) {
		foo = x;
		bar = y;
	}
	
	public String toString() {
		return "foo: " + foo + " bar: " + bar;
	}
	
	public int compareTo(FooBar fb) {
		if (this.foo < fb.foo && this.bar < fb.bar) {
			return -1;
		} else if (this.foo == fb.foo && this.bar == fb.bar) {
			return 0;
		} 
		return 1;
	}
}


public class Main {
    public static void main(String[] args)
        throws IOException
    {
    	ArrayList<FooBar> a  = new ArrayList<FooBar>();
    	a.add(new FooBar(3,4));
    	a.add(new FooBar(3,4));
    	a.add(new FooBar(9,10));
    	a.add(new FooBar(1,1));
    	System.out.println(a);
    	Collections.sort(a);
    	System.out.println(a);
		
 }  // main
}// class