Question

怎么判断一个字符里面某个字符串出现的次数

Answer 1

String str = "javajfiewjavajfiowfjavagkljjava";

countString(str,"java");

private static void countString(String str,String s) {
int count = 0;
for(int i= 0; i<=str.length(); i++){
if(str.indexOf(s) == i){
str = str.substring(i+1,str.length());
count++;
}
}
System.out.println(s+"出现的次数为"+count+"次");
}