java - 在Java中，如何检查字符串是否包含子字符串（忽略大小写）？ [重复](In Java, how do I check if a string contains a substring (ignoring case)? [duplicate])

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(这个问题已经在这里有了答案：)

• How to check if a String contains another String in a case insensitive manner in Java?

  (如何在Java中以不区分大小写的方式检查字符串是否包含另一个字符串？)

  19 answers

  (19个答案)

I have two String s, str1 and str2 .

(我有两个String ， str1和str2 。)

How do I check if str2 is contained within str1 , ignoring case?

(如何检查是否str2被包含在str1 ，忽略大小写？)

  ask by trinity translate from so

Answer 1

str1.toLowerCase().contains(str2.toLowerCase())