雅虎2個面試

package com.test;
import java.util.ArrayList;
import java.util.List;
 /**
 * aiguoxin
 * 2010-10-26上午11:10:53
 *
 * 比較2個list是否相等，即每項對應相等
 * 如果是對象，則equals相等
 * 如果是Float、Integer、Double，只要值相等即可
 */
public class CompareList {
    /**
     * @param args
     */
    public static void main(String[] args) {
        List<Object> la = new ArrayList<Object>();
        List<Object> lb = new ArrayList<Object>();
        la.add(new Integer(1));
        la.add(new String("asd"));
        la.add(new Double(1.4));

        lb.add(new Float(1.1f));
        lb.add(new String("asd"));
        lb.add(new Float(2.6));

        boolean b = compare(la,lb);
        System.out.println(b);
    }

    public static boolean compare(List<Object> la,List<Object> lb){
        boolean flag = true;
        for(int i = 0; i < la.size(); i++){
            Object a = la.get(i);
            Object b = lb.get(i);
            int ia = 1;
            int ib = -1;
            if(a instanceof Float)ia = ((Float) a).intValue();
            if(a instanceof Double)ia = ((Double) a).intValue();
            if(a instanceof Integer)ia = ((Integer) a).intValue();

            if(b instanceof Float)ib = ((Float) b).intValue();
            if(b instanceof Double)ib = ((Double) b).intValue();
            if(b instanceof Integer)ib = ((Integer) b).intValue();

            if(!a.equals(b) && ia != ib)flag = false;
        }

        return flag;
    }
}