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);}}
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