/**

• 直接調(diào)用String對(duì)象的方法,String.indexOf(pattern);返回子字符串第一次在String中出現(xiàn)的索引,如果不存在子字符串則返回-1
• @author Administrator

*/

public class test {

    public static void main(String[] args) {
        String txt = "ABACADABRAC";
        String pattern = "ABRA";
        int i = txt.indexOf(pattern);
        System.out.println(i);
    }

}