How to Check if a String contains given Substring in Java - Step by Step Examples

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How to Check if a String contains given Substring in Java ?

Answer

To check if a string contains a given substring in Java, you can use the 'contains' method of the String class.

✐ Examples

1 Check if a String contains given Substring using 'contains' method

In this example,

We create a function 'containsSubstring' that takes a string and a substring as input.
We use the 'contains' method of the string object to check if the substring is present in the string.
If the substring is found, 'true' is returned; otherwise, 'false'.
Finally, we print the result.

Java Program

// Java
public class Main {
    public static boolean containsSubstring(String str, String substr) {
        return str.contains(substr);
    }

    public static void main(String[] args) {
        String str = "Hello World";
        String substr = "World";
        boolean contains = containsSubstring(str, substr);
        System.out.println("String contains substring '" + substr + "': " + contains);
    }
}

Output

String contains substring 'World': true

Summary

In this tutorial, we learned How to Check if a String contains given Substring in Java language with well detailed examples.