统计数组中相同元数的java实现

package org.wyh;

import java.util.*;

public class GetEveryTotal{

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub

		ArrayList<String> list = new ArrayList<String>();
		list.add("1");
		list.add("1");
		list.add("1");
		list.add("3");
		list.add("3");
		list.add("2");
		list.add("4");

		HashMap<String, Integer> hash = new HashMap<String, Integer>();
		for (int i = 0; i < list.size(); i++) {
			try {

				if (!hash.isEmpty() && hash.containsKey(list.get(i))) {
					hash.put(list.get(i).toString(), hash.get(list.get(i)) + 1);
				} else {
					hash.put(list.get(i).toString(), 1);
				}
			} catch (Exception e) {

			}
		}
		Set<String> set = hash.keySet();
		for (String key : set) {
			System.out.println(key + "==>" + hash.get(key));
		}
	}

}

评论

2 楼 jayzotion 2009-02-23  

楼上兄弟抬举了,只是工作中用到,随便记录一下,谈不上厉害

1 楼 jsjxqjy 2009-02-22  

兄弟很厉害