统计子串在另一个字符中出现的次数

package cc;

//要求：统计一个子串在一个字符串中出现的次数
//思路：不断地截取子串
public class StringTest1 {
	public static void main(String[] args) {
		StringDemo1 demo1 = new StringDemo1();
		System.out.println("出现的次数是" + demo1.count("abcabcccabc", "abc"));
	}
}

class StringDemo1 {
	public int count(String string, String subString) {
		int count = 0;
		while (string.indexOf(subString) != -1) {// 只要子串在原串中出现
			count++;
			int local = string.indexOf(subString);
			string = string.substring(local + 1);// 注意是local+1
		}
		return count;
	}
}