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