The method contains() checks if a String contains another String. The method accepts a CharSequence. So, we can pass any of the implementing classes to it such as StringBuilder and StringBuffer.

Available Signatures

public boolean contains(CharSequence s)

Example

@Test
public void whenCallContains_thenCorrect() {
 String s = "abcd";
 
 assertTrue(s.contains("abc"));
 assertFalse(s.contains("cde"));
}