用Java替换字符串中的最后一个字符 [英] Replacing last character in a String with java

问题描述

我有一个字符串:

String fieldName = "A=2,B=3 and C=3,";

现在我要用空格替换最后一个 .

Now I want to replace last , with space.

我用过:

if (fieldName.endsWith(",")) {
    fieldName.replace(",", " ");
    fieldName = fieldName.replace((char) (fieldName.length() - 1), 'r');
}

System.out.println("fieldName = " + fieldName);

但是我仍然得到相同的旧字符串.我该如何获取此输出呢?

But still I am getting the same old string. How I can get this output instead?

fieldName = A=2,B=3 and C=3

推荐答案

您可以简单地使用 substring :

if(fieldName.endsWith(","))
{
  fieldName = fieldName.substring(0,fieldName.length() - 1);
}

在执行 substring 后，确保将 查看全文