StringUtils leftPad() Example

StringUtils leftPad() Example | In the StringUtils class, we have a method called leftPad() which is used to add whitespaces or given characters/strings to the left of the string. There are three different variations of this method as listed below. The syntax for the leftPad() method and its variations are as follows:-

• public static String leftPad(final String str, final int size)
• public static String leftPad(final String str, final int size, final char padChar)
• public static String leftPad(final String str, final int size, String padStr)

Parameters:
string: the string needed to add spaces or zeros
size: it is an integer value, which should say the final length of the string after padding.
padChar: the character which needs to be padded.
padStr: the string which needs to be padded.
Return type: String.
Returns: the string after padding.

Apache StringUtils leftPad() Example-1

This example is to demonstrate the working of public static String leftPad(final String str, final int size).

import org.apache.commons.lang3.StringUtils;

public class Main {
    public static void main(String[] args) {
        String str = "Books";
        int number = 19;
        System.out.println("Length of the string before padding: " + str.length());
        String str1 = StringUtils.leftPad(str, number);
        System.out.printf("StringUtils.rightPad(%s, %s) = %s", str, number, str1);
        System.out.println("\nLength of the string after padding: " + str1.length());

    }
}

Output:-

Length of the string before padding: 5
StringUtils.leftPad(Books, 19) = Books
Length of the string after padding: 19

StringUtils leftPad() Example-2

This is to demonstrate the working of the public static String leftPad(final String str, final int size, String padStr) method.

import org.apache.commons.lang3.StringUtils;

public class Main {
    public static void main(String[] args) {
        String str = "Books";
        int number = 19;
        System.out.println("Length of the string before padding: " + str.length());
        String str1 = StringUtils.leftPad(str, number, "Something");
        System.out.printf("StringUtils.rightPad(%s, %s) = %s", str, number, str1);
        System.out.println("\nLength of the string after padding: " + str1.length());
    }
}

Output:-

Length of the string before padding: 5
StringUtils.rightPad(Books, 19) = SomethingSometBooks
Length of the string after padding: 19

Java StringUtils leftPad() Example-3

This code demonstrates the working of the public static String leftPad(final String str, final int size, final char padChar) method.

import org.apache.commons.lang3.StringUtils;

public class Main {
    public static void main(String[] args) {
        String str = "Books";
        int number = 19;
        System.out.println("Length of the string before padding: " + str.length());
        String str1 = StringUtils.leftPad(str, number, 'A');
        System.out.printf("StringUtils.leftPad(%s, %s) = %s", str, number, str1);
        System.out.println("\nLength of the string after padding: " + str1.length());
    }
}

Output:-

Length of the string before padding: 5
StringUtils.leftPad(Books, 19) = AAAAAAAAAAAAAABooks
Length of the string after padding: 19

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