小编use*_*919的帖子

我需要一种用更少的代码来完成相同操作的方法。这将帮助我更好地理解 Java。以下代码的输出将是：new, boy, 3pm, to

public class substring {

public static void main(String[] args) {
    // TODO Auto-generated method stub
    String str= "a new, boy with new haircut boy, 3pm to boy 8pm margian 3pm to ghost";
    String concant = "";
    int occurance =0;
    str = str.replaceAll(",", "");
    System.out.println(str);
    String[] subStr = str.split("\\s");
    for(String sub:subStr)
    {
        for (String sub1:subStr) {
            if(sub.equals(sub1))
            { 
                 occurance++;
                    
                if(occurance>=2)
                {
                    if(!concant.contains(sub))
                    {
                        if(concant!= "")
                          concant = concant +", "+ sub;
                        else
                            concant = sub;
                              
                    } …

我匹配一个模式,在句子"你是测试"中是一个字符串"test",并用"test"替换它.

StringBuffer sb = new StringBuffer();
Pattern pattern = Pattern.compile("test", Pattern.CASE_INSENSITIVE);
Matcher matcher = pattern.matcher("you are test");
while (matcher.find()) {
matcher.appendReplacement(sb, "test\"));
            }
matcher.appendTail(sb);
replacementString = sb.toString();

问题出在声明中matcher.appendReplacement(sb, "test\"));,"\"被视为特殊字符,未执行替换.

请分享您对如何克服这种情况以及如何用字符串中的"\"替换您的想法.