技術標籤：java

1.統計每個單詞出現的次數
2.有如下字串"If you want to change your fate I think you must come to the dark horse to learn java"(用空格間隔)
3.列印格式：
to=3
think=1
you=2
//…
**=====================================================================**

public class Test {
    public static void main(String[] args)
 
 {
        Scanner input=new Scanner(System.in);
        //建立HashMap
        Map<String, Integer> map = new HashMap<>();

        String str = "If you want to change your fate I think you must come to the dark horse to learn java";
        //以空格“ ”為分隔符,將單詞分割儲存到陣列strArr中
        String[
 
] strArr = str.split(" ");
        //統計語句中的每個單詞出現的次數
        for (String s : strArr) {
            if (!map.containsKey(s)) {//map.containsKey():判斷map中是否存在所對應的key值
                map.put(s, 1);
            } else {
                map.put(s, map.get(s) + 1);
            }
        }
        //列印
 

        System.out.println(map);
    }
}

測試：