Question

temp.matches 即使存在正确的匹配表达式，此正则表达式也会返回false（ SOUTH，NORTH，）

执行后的临时值 SOUTH，NORTH，

import java.util.Arrays;
public class DirReduction {

    public static String[] dirReduc(String[] arr) {

        boolean check=false;
        String inputToString =Arrays.toString(arr);
        String str1 = inputToString.replace("]", ", ").replace("[", ""),temp;
        do {
            temp=str1.replaceAll("NORTH, SOUTH, " , "").replaceAll("SOUTH, NORTH, " , "").replaceAll("EAST, WEST, " , "").replaceAll("WEST, EAST, " , "");
            check = temp.matches(".*\\b(NORTH, SOUTH, |SOUTH, NORTH, |EAST, WEST, |WEST, EAST, )\\b.*");
            System.out.println(temp);
            str1=temp;
        }while(check);

        String[] splitArray = str1.split(", ");
        String[] fi =new String[splitArray.length];
        int i=0;
        for(String item:splitArray) {
            fi[i++]=item;
        }
        System.out.println(Arrays.toString(fi));
        return fi;
    }

    public static void main(String[] args) {
        String[] input = new String[] { "NORTH","SOUTH","SOUTH","EAST","WEST","NORTH"};
        dirReduc(input);
    }
}

Answer 1

我假设你的replaceAll语句没有替换任何东西。您的输入字符串在逗号后面没有空格，但您的搜索掩码有空格。所以什么都不会被替换。

Java String Match返回false，即使它是true

1 个答案: