如何在 ArrayList<String> 中的每个元素上附加分号 [英] How to append semi-colon on to each element in an ArrayList&lt;String&gt;

问题描述

我目前正在尝试在 ArrayList 中每个元素的末尾附加一个分号.

I am currently trying to append a semi-colon onto the end of each element in an ArrayList .

代码:

ArrayList<String> emailAddresses = new ArrayList<String>();

public void getEmailAddresses() throws InterruptedException {
    driver.findElement(By.className("userlink-0")).click();
    String emailAddress = driver.findElement(By.id("email")).getText();
    emailAddresses.add(emailAddress);
    hs.addAll(emailAddresses);
    emailAddresses.clear();
    emailAddresses.addAll(hs);

}

最终我将使用此电子邮件地址列表并将其输出到收件人字段，以便使用 Java 发送电子邮件.因此，为什么我试图在元素后附加分号以分隔电子邮件地址.

Eventually I will be taking this list of email addresses and outputting it to the recipients field for sending an email using Java. Hence why I am trying to append semi-colons to the elements in order to separate the email addresses.

谢谢

推荐答案

假设您使用 Java 8，您可以使用带有 Stream API="https://docs.oracle.com/javase/8/docs/api/java/util/stream/Collectors.html#joining-java.lang.CharSequence-" rel="noreferrer">加入(CharSequence delimiter) 作为收集器 允许连接输入元素，由指定的分隔符分隔，按遇到顺序作为下一个:

Assuming that you use Java 8, you could do that using the Stream API with joining(CharSequence delimiter) as collector allowing to concatenate the input elements, separated by the specified delimiter, in encounter order as next:

String emails = emailAddresses.stream().collect(Collectors.joining(";"));

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