小字符串在大字符串里出现的次数

package cn.itcast;

public class test {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		String s="javailovejavabutibetterjavaandpthonjava";
		String s1="java";
		int count=0;
		int x=s.indexOf("java");
		while(x<s.length()){
		 if(x!=-1)
		 {
			s=s.substring(x+4);
			x=s.indexOf("java");
			count++;
		 }else{
			 break;
		 }
		}
		System.out.println(count);
	}

}