Question

我的要求是用换行符替换字符串中的所有逗号。

示例：

AA,BB,CC

应表示为

AA
BB
CC

这是我用newline替换逗号的实现，

public String getFormattedEmails(String emailList) {
    List<String> emailTokens = Arrays.asList(emailList.split(","));
    String emails = "";
    StringBuilder stringBuilder = new StringBuilder();
    String delimiter = "";
    for(String email : emailTokens){
        stringBuilder.append(delimiter);
        stringBuilder.append(email);
        delimiter = "\n";
    }
    emails = stringBuilder.toString();
    return emails;
}

此方法用空格替换所有逗号。任何人都可以指出我哪里出错了？

Answer 1

只需使用以下代码：

String emailList="AA,BB,CC";
emailList=emailList.replaceAll(",", "\n");
System.out.println(emailList);

<强>输出

AA
BB
CC

现在基于您的代码，您的方法如下所示：

public String getFormattedEmails(String emailList) {
String emails=emailList.replaceAll(",", "\n");
return emails;
}

希望有所帮助：

Answer 2

String emails = emailList.replaceAll(",", "\n");

Answer 3

您也可以使用Scanner

String emails = "AA,BB,CC"
String emailsNew = replaceCommas(emails);

String replaceCommas(String a){
    String result = "";
    Scanner scan = new Scanner(a);
    scan.useDelimiter(",");
    while(scan.hasNext()){
        result += scan.next() + "\n";
    }
    return result;
}

System.out.println(emailsNew);将打印：

AA
BB
CC

在java中用逗号替换逗号

3 个答案: