In this section we will learn what the String contains() method is and how to use it in Java.

What is Java String contains() Method?

When we want to check a string value to see if it contains a specific sequence of characters in it, we can use the contains() method.

Java contains() Method Syntax:

public boolean contains(CharSequence chars)

contains() Method Parameters:

The `contains()` method takes a string as its argument and checks the target string to see if it contains the character sequence that we set as the argument of the method.

Note: The `CharSequence` is an interface and the `String` class implemented it. So we can use String objects as the argument to this method.

contains() Method Return Value:

The return value of this method is of type boolean:

The method returns true of the target string contained the character sequence and false otherwise.

Example: using String contains() method

public class Simple {

    public static void main(String[] args) {
        String s = "Life is good";
        System.out.println(s.contains("Life"));
        System.out.println(s.contains("is not good"));
        System.out.println(s.contains("is good"));
    }
}

Output:

true

false

true