Java:字符串类简单的正则表达式

 class Test
 {
     public static void main(String[] args)
     {
         String str = "xia..as....yuan.com";

         //判断
         boolean b1 = str.endsWith(".com");
         boolean b2 = str.startsWith("xia");
         System.out.println(b1);
         System.out.println(b2);

         //切割
         String regex = "\\.+";
         String[] arr = str.split(regex);
         for(String s:arr)
         {
             System.out.println(s);
         }

         //替换
         String regex1 = "\\.+";
         String s1 = str.replaceAll(regex1,"*");
         System.out.println(s1);

         //多个标符变一个
         String regex2 = "(.)\\1+";
         String s2 = str.replaceAll(regex2,"$1");
         System.out.println(s2);
     }
 }

//对于匹配：可以查看API,找到匹配器Pattern以及match即可