java regex 编译和匹配器符号未找到错误

Question

i am trying to solve project euler #26 and i am using regex to solve the problem but when compiling i am getting method not found error

import java.lang.*;
import java.math.*;
import java.util.regex.*;

class Pattern {
    public static void main(String args[]) {
        int count = 0;
        String regex = "(//d+?)//1)";
        Pattern p = Pattern.compile(regex); //cannot find symbol compile
        BigDecimal b = new BigDecimal("1");
        for (int i = 1; i <= 10; i++) {
            BigDecimal b1 = new BigDecimal(i);
            String elem = b.divide(b1, 15, RoundingMode.HALF_UP).toString();
            Matcher match = p.matcher(elem); //cannot find symbol matcher
            while (match.find()) {
                int x = match.start() - match.end();
                if (x > count)
                    count = x;
            }
        }
        System.out.println("the highest count is" + count);
    }    
} 

Answer 1

您有多个问题:

1. 正如 @Peter777 指出的那样，您的正则表达式是错误的
2. 您的类名为Pattern，与java.util.regex.Pattern相同，这会导致编译器尝试在您的类上使用compile方法而不是java.util.regex 一个。

要尝试解决该问题，请修复正则表达式并将您的类重命名为其他名称(或使用别名导入 java.util.regex 类)。