获取一个字符串内某种字符串出现的次数

/**

获取一个字符串内某种字符串出现的次数

*/

class StringTest1 

{

public static int getIndexKeyCount(String string , String key){

int index = 0 ;

int count = 0 ;

int length = key.length();

while((index = string.indexOf(key,index)) != -1){

index = index + length;

count ++ ;

}

return count ;

}

public static void main(String[] args) 

{

String string = "Hello World!";

System.out.println(StringTest1.getIndexKeyCount(string,"o"));

}

}