您可以通过三种方式搜索字符串是否包含子字符串:

You have three way to search if an string contain substring or not:

String string = "Test, I am Adam";
// Anywhere in string
b = string.indexOf("I am") > 0;         // true if contains 

// Anywhere in string
b = string.matches("(?i).*i am.*");     // true if contains but ignore case

// Anywhere in string
b = string.contains("AA")  ;             // true if contains but ignore case