import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;

public class CompareClassTest {

    /**
     * @param args
     */
    public static void main(String[] args) {
        List<CompObj> list = new ArrayList<CompObj>();
        int[] nums={8,2,9,3,5,10,16,2};
        for(int i:nums)
        {
            list.add(new CompObj(i));
        }
        
        //Collections.sort(list);//調用類默認的比較方法
        Collections.sort(list, new CompObjMaxMin());//調用自定義的比較器
        
        for(CompObj c:list)
        {
            System.out.print(c);
        }
        

        
    }
    
    


}

//自定義的比較器
class CompObjMaxMin implements Comparator{

    @Override
    public int compare(Object o1, Object o2) {
        CompObj c1 = (CompObj)o1;
        CompObj c2 = (CompObj)o2;
        
        if(c1.num>c2.num)
        {
            return -1;
        }else if(c1.num<c2.num)
        {
            return 1;
        }
        return 0;
    }
    
}

//自定義的類，帶默認比較方法
class CompObj implements Comparable{
    int num;

    public CompObj(int num) {
        super();
        this.num = num;
    }

    @Override
    public int compareTo(Object o) {
        if(o instanceof CompObj)
        {
            CompObj co = (CompObj)o;
            if(this.num>co.num)
            {
                return 1;
            }
            else if (this.num<co.num)
            {
                return -1;
            }
        }
        return 0;
    }
    @Override
    public String toString()
    {
        return num+" ";
    }
    
}