统计字符串中每个单词出现的次数

字符串"wo ai java abc java abc wo"，统计字符串中每个单词出现的次数

package work;

import java.awt.RenderingHints.Key;
import java.util.HashMap;

/*
 * 3.字符串"wo ai java abc java abc wo"，统计字符串中每个单词出现的次数
 */
public class Work03_StringCount {
	public static void main(String[] args) {
		String str= "wo ai java abc java abc wo";
		String[] newStr = str.split(" ");
		HashMap<String, Integer> hashMap = new HashMap<String, Integer>();
		for(int i = 0 ; i < newStr.length; i++) {
			String key = newStr[i];
			Integer value = hashMap.get(key);
			if(value == null) {
				hashMap.put(key, 1);
			}else {
				value++;
				hashMap.put(key, value);
			}
		}
		System.out.println(hashMap);
	}
}