删除字符串的Java字符

Question

How should I go about removing the two characters "[" and "]" from a string

Example: [45.677]

Desired: 45.677

I would preferably like to preform this in on single handed method call. Moreover, Not two str.replace() calls.

Answer 1

使用正则表达式

string.replaceAll("\\[|\\]","");

Answer 2

use below regex:

 System.out.println( "[45.677]".replaceAll("\\[|]",""));

as [ is a special character(meta character) you should escape it with backslash in order to treat it as a normal character. thus \\\\[

Answer 3

除了使用replaceAll ，如果[]字符始终位于同一位置（字符串的开头和结尾），则还可以使用：

string.substring(1, string.length() - 1);

Answer 4

尝试这个

System.out.println("[45.677]".replaceAll("[\\[\\]]", ""));