Java计算子字符串在字符串中出现的次数
public class Demo {
public static void main(String[] args) {
String str = "HelloHello HelloHello World Hello China Hello Tomorrow";
// 匹配的子串在字符串中的下标
int index = 0;
// 计算出现的次数
int count = 0;
String findStr = "Hello";
while((index = str.indexOf(findStr, index)) != -1) {
(str.charAt(index) + " ");
index += ();
count++;
}
(count);
}
}// out: H H H H H H 6