使用正则表达式JAVA用*替换特定单词后的每个字符

Question

I want to replace each char after 'to' with * using regex in Java.

Input:

String str = "thisisstringtoreplace"

Expected output:

thisisstringto*******

I am using

Pattern.compile("(?<=password=).*$")

This pattern replace all char with 1 * , I want * of remaining sting size (7 in this case). The action I want to perform is part of framework so I just need a regex for this.

Answer 1

You may use

s = s.replaceAll("(?<=\\G(?!^)|to).", "*");

See the regex demo .

Details

• (?<=\\G(?!^)|to) - either the end of the previous successful match or to
• . - any char but a line break char.