replaceAll坑

String str = "Hino Supa and ruben";
System.out.println(str.replace("[idea]", ""));
System.out.println(str.replaceAll("[idea]", ""));

Hino Supa and ruben
Hno Sup n rubn

Replaces each substring of this string that matches the given regular expression with the given replacement.
// 翻译过来就是
用给定的替换项替换该字符串中与给定的正则表达式匹配的每个子字符串。

Replaces each substring of this string that matches the literal target sequence with the specified literal replacement sequence.
// 翻译
用指定的文字替换序列替换该字符串中与文字目标序列匹配的每个子字符串。