In Java, how do I check if a string contains a substring (ignoring case)? [duplicate]

In Java, how do I check if a string contains a substring (ignoring case)? [duplicate]

java string substring

java

Java - removing first character of a string

java string substring

java

How do I get the last character of a string?

java string substring

java

Java: Getting a substring from a string starting after a particular character

java string substring

java

How to replace case-insensitive literal substrings in Java

java string replace substring case-insensitive

java

How to find nth occurrence of character in a string?

java string substring

java

Time complexity of Java's substring()

java substring time-complexity

java

Finding second occurrence of a substring in a string in Java

java string substring indexof

java

substring index range

java string substring

java

Limiting the number of characters in a string, and chopping off the rest

java string substring

java

How to replace a substring of a string [duplicate]

java string substring

java