Java 25 (LTS) reference · String Methods

Java String substring() Method

Return part of a string from a start index up to (not including) an end index. The original is unchanged.

Java 25 (LTS) Since Java 1.0

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Syntax

string.substring(beginIndex, endIndex)

Parameters

Parameter	Description
`beginIndex` int	First index to include.
`endIndex` optional int	Index to stop before. Default: `length()`

Return value

A new String.

Examples

Split an email address

public class Main {
    public static void main(String[] args) {
        String email = "[email protected]";
        int at = email.indexOf("@");
        System.out.println(email.substring(0, at));
        System.out.println(email.substring(at + 1));
    }
}

Output

ana
example.com

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Truncate long text

public class Main {
    public static void main(String[] args) {
        String title = "Interview Questions";
        String shortTitle = title.length() > 9 ? title.substring(0, 9) + "…" : title;
        System.out.println(shortTitle);
    }
}