RetroSearch Browse

Home - News ( United States | United Kingdom | Italy | Germany ) - Football scores

Showing content from https://www.geeksforgeeks.org/java/stringbuilder-substring-method-in-java-with-examples/ below:

StringBuilder substring() method in Java with examples

Last Updated : 19 Aug, 2019

In StringBuilder class, there are two types of substring method depending upon the parameters passed to it.

substring(int start)

The

substring(int start)

method of

StringBuilder class

is the inbuilt method used to return a substring start from index start and extends to end of this sequence. The string returned by this method contains all character from index start to end of the old sequence.

Syntax:

public String substring(int start)

Parameters:

This method accepts only one parameter

start

which is Integer type value refers to the start index of substring.

Return Value:

This method returns

the substring

lie in the range start to end of old sequence.

Exception:

This method throws

StringIndexOutOfBoundsException

if start is less than zero, or greater than the length of this object. Below programs illustrate the StringBuilder substring() method:

Example 1: Java


 // Java program to demonstrate
// the substring() Method.

class GFG {
    public static void main(String[] args)
    {

        // create a StringBuilder object
        // with a String pass as parameter
        StringBuilder str
            = new StringBuilder("GeeksForGeeks");

        // print string
        System.out.println("String contains = "
                           + str);

        // get substring start from index 5
        // using substring() and print results
        System.out.println("SubSequence = "
                           + str.substring(5));
    }
}

Output:

String contains = GeeksForGeeks
SubSequence = ForGeeks

Example 2:

To demonstrate StringIndexOutOfBoundsException

Java


 // Java program to demonstrate
// Exception thrown by the substring() Method.

class GFG {
    public static void main(String[] args)
    {

        // create a StringBuilder object
        // with a String pass as parameter
        StringBuilder str
            = new StringBuilder("Indian Team Played Well");

        try {
            // get substring starts from index -7
            // using substring() and print
            str.substring(-7);
        }

        catch (Exception e) {
            System.out.println("Exception: " + e);
        }
    }
}

Output:

Exception: java.lang.StringIndexOutOfBoundsException: String index out of range: -7

substring(int start, int end)

The

substring(int start, int end)

method of

StringBuilder class

is the inbuilt method used to return a substring start from index start and extends to the index end-1 of this sequence. The string returned by this method contains all character from index start to index end-1 of the old sequence.

Syntax:

public String substring(int start)

Parameters:

This method accepts two parameter

start

which is Integer type value refers to the start index of substring and

end

which is also a Integer type value refers to the end index of substring.

Return Value:

This method returns

the substring

lie in the range index start to index end-1 of old sequence.

Exception:

This method throws

StringIndexOutOfBoundsException

if start or end are negative or greater than length(), or start is greater than end. Below programs illustrate the StringBuilder.substring() method:

Example 1: Java


 // Java program to demonstrate
// the substring() Method.

class GFG {
    public static void main(String[] args)
    {

        // create a StringBuilder object
        // with a String pass as parameter
        StringBuilder str
            = new StringBuilder("GeeksForGeeks");

        // print string
        System.out.println("String contains = " + str);

        // get substring start from index 5 to index 8
        // using substring() and print results
        System.out.println("SubSequence = "
                           + str.substring(5, 8));
    }
}

Output:

String contains = GeeksForGeeks
SubSequence = For

Example 2:

To demonstrate StringIndexOutOfBoundsException

Java


 // Java program to demonstrate
// Exception thrown by the substring() Method.

class GFG {
    public static void main(String[] args)
    {

        // create a StringBuilder object
        // with a String pass as parameter
        StringBuilder str
            = new StringBuilder("Indian Team Played Well");

        try {
            // get substring starts from index 7
            // and end at index 3
            // using substring() and print
            str.substring(9, 3);
        }

        catch (Exception e) {

            System.out.println("Exception: " + e);
        }
    }
}

Output:

Exception: java.lang.StringIndexOutOfBoundsException: String index out of range: -6

References: https://docs.oracle.com/javase/10/docs/api/java/lang/StringBuilder.html#substring(int, int) https://docs.oracle.com/javase/10/docs/api/java/lang/StringBuilder.html#substring(int)

RetroSearch is an open source project built by @garambo | Open a GitHub Issue

Search and Browse the WWW like it's 1997 | Search results from DuckDuckGo

HTML: 3.2 | Encoding: UTF-8 | Version: 0.7.4