Substring in java

 
Substring in java

In Java, a substring refers to a portion of a string. It allows you to extract a part of a string based on its starting index and optionally its ending index. The syntax for extracting a substring in Java is:

javaCopy code
String substring(int beginIndex)
String substring(int beginIndex, int endIndex)

The substring(int beginIndex) method returns a new string that is a substring of the original string starting from the beginIndex inclusive to the end of the string.

The substring(int beginIndex, int endIndex) method returns a new string that is a substring of the original string starting from the beginIndex inclusive and ending just before the endIndex.

Code Example :

public class substr {

    public static void main(String[] args) {

        String name = "Asgar";

        for (int i = 0; i <= name.length(); i++) {

            System.out.println(name.substring(0, i));

        }

     

    }

}

Output:

A As Asg Asga Asgar

another Code Example:

public class SubstringExample {

    public static void main(String[] args) {

        String str = "Hello, World!";

       

        // Extract substring from index 7 to the end

        String substr1 = str.substring(7);

        System.out.println(substr1); // Output: World!

       

        // Extract substring from index 7 to index 12 (exclusive)

        String substr2 = str.substring(7, 12);

        System.out.println(substr2); // Output: World

    }

}

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