How to use replace to realize string substitution in Java

This article is to share with you about how to use replace to achieve string substitution in Java, the editor thinks it is very practical, so I share it with you to learn. I hope you can get something after reading this article.

There are three main string replacement functions in Java: replace, replaceFirst and replaceAll.

1.replace function

Public String replace (char oldChar,char newChar) all oldChar in the replacement string is newChar, and the return value is the string

String word = "wangwang"; System.out.println (word.replace ("wa", "mb")); / / returns the string "mbngmbng"

2.replaceFirst function

Public String replaceFirst (String regex, String replacement) replaces only the first matched value

String word = "wangwang"; System.out.println (word.replaceFirst ("wa", "mb")); / / return string "mbngwang" above is how to use replace to achieve string substitution in Java. The editor believes that there are some knowledge points that we may see or use in our daily work. I hope you can learn more from this article. For more details, please follow the industry information channel.