获取另一个字符串中一个字符串的出现次数 [英] Getting the number of occurrences of one string in another string

问题描述

我需要输入两个字符串，第一个是任何单词，第二个字符串是前一个字符串的一部分，我需要输出第二个字符串出现的次数。例如：String 1 = CATSATONTHEMAT String 2 = AT。输出为3，因为AT在CATSATONTHEMAT中出现三次。这是我的代码：

I need to input a two strings, with the first one being any word and the second string being a part of the previous string and i need to output the number of times string number two occurs. So for instance:String 1 = CATSATONTHEMAT String 2 = AT. Output would be 3 because AT occurs three times in CATSATONTHEMAT. Here is my code:

public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);

    String word8 = sc.next();
    String word9 = sc.next();
    int occurences = word8.indexOf(word9);
    System.out.println(occurences);
}

输出 1 当我使用这段代码时。

It outputs 1 when I use this code.

推荐答案

您也可以尝试：

public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);

    String word8 = sc.nextLine();
    String word9 = sc.nextLine();
    int index = word8.indexOf(word9);
    sc.close();
    int occurrences = 0;
    while (index != -1) {
        occurrences++;
        word8 = word8.substring(index + 1);
        index = word8.indexOf(word9);
    }
    System.out.println("No of " + word9 + " in the input is : " + occurrences);
}

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