Java String contains()

Syntax of contains()

The syntax of the String contains() method is:

string.contains(CharSequence ch)

Here, string is an object of the String class.

contains() Parameters

The contains() method takes a single parameter.

• ch (charSequence) - a sequence of characters

Note: A charSequence is a sequence of characters such as: String, CharBuffer, StringBuffer etc.

contains() Return Value

• returns true if the string contains the specified character
• returns false if the string doesn't contain the specified character

Example 1: Java String contains()

Here, str.contains("") gives true because the empty string is a subset of every other string.

Example 2: Using contains() With if...else

Output

Learn Java contains Java
Learn Java doesn't contain java