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package cn.edu.xmu.ru.utils;import java.util.Comparator;import cn.edu.xmu.ru.domain.Slashdot;public class RUComparator implements Comparator {	@Override	public int compare(Object o1, Object o2) {		Slashdot one = (Slashdot)o1;		Slashdot theother = (Slashdot)o2;		if(one.getScore() <= theother.getScore()){			return -1;		}else if(one.getScore() > theother.getScore()){			return 1;		}		return 0;	}}

Collections.sort(lst, new RUComparator());

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