标签:nal 字符串 vat turn code rar null ++ 字符
private int countNum(final String str, final char ch){ int num = 0; if (str != null){ for(char i: str.toCharArray()){ if(i==ch){ ++num; } } } return num; }
标签:nal 字符串 vat turn code rar null ++ 字符
原文地址:https://www.cnblogs.com/wenlin-gk/p/9849679.html