检查两个单词以查看单词a的开头是否等于单词b

Question

Given the following strings

String a = "hello";
String b = "hell";
String c = "help";

I would like to find out if string b is a substring of a, and if string c is a substring of a.

You can see here the answer is clearly yes for b and no for c. How can I perform this test in Java?

Answer 1

很简单：

if (a.startsWith(b))

Answer 2

Try this:

if(a.contains(b)) {...}
if(a.contains(c)) {...}

works also with:

if(a.contains("ell")) {...}