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"));
}
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