virtual-patient/virtual-patient-model/src/main/java/com/supervision/util/StringChartUtil.java

package com.supervision.util;

import java.util.Arrays;

/**
 * @Author：longbao
 * @Date：2024/11/1 13:52
 * @Description:
 */
public class StringChartUtil {


    /**
     * 字符串中某个字符出现的次数
     * @param str 源字符串
     * @param targetChar 查找字符
     * @return 出现次数
     */
    public static int countChar(String str, char targetChar) {
        return (int) Arrays.stream(str.split(""))
                .filter(s -> s.charAt(0) == targetChar)
                .count();
    }
}