How to Repeat a String in Java

1. Repeat a String Using regex in Java
2. Repeat a String Using .repeat() in Java
3. Repeat a String Using Apache Commons StringUtils Class

This article will go through several simple approaches to repeating a string in Java.

Repeat a String Using regex in Java

The use of regex can be an option for repeating a string. Let’s break it down with a basic example, as shown below.

In the below-discussed example, we’ll repeat the below string 5 times:

String shanii = " Hey! Muhammad Zeeshan here ";

The variable name Stringrepeated will be used to store the repeated string, and we will proceed to print that variable.

String Stringrepeated = new String(new char[5]).replace("\0", shanii);
System.out.println(Stringrepeated);

Example Code:

public class Example1ByZeeshan {
  public static void main(String[] args) {
    String shanii = " Hey! Muhammad Zeeshan here ";
    String Stringrepeated = new String(new char[5]).replace("\0", shanii);
    System.out.println(Stringrepeated);
  }
}

Output:

Hey! Muhammad Zeeshan here  Hey! Muhammad Zeeshan here  Hey! Muhammad Zeeshan here  Hey! Muhammad Zeeshan here  Hey! Muhammad Zeeshan here

Repeat a String Using .repeat() in Java

The value of the string returned by this method is the concatenation of the provided string repeated the specified number of times. Let’s understand it with an example below.

In the following example, we will only use the .repeat() function to repeat the specified string 5 times. A blank string will be returned when the string does not include any characters or the count is 0.

Example Code:

public class Example2ByZeeshan {
  public static void main(String[] args) {
    String shanii = " Let's Code ";
    System.out.println(shanii.repeat(5));
  }
}

Output:

Let's Code  Let's Code  Let's Code  Let's Code  Let's Code

There are other possibilities if your project uses Java libraries: the StringUtils function in Apache Commons.

Repeat a String Using Apache Commons StringUtils Class

We can utilize the Apache Common’s StringUtils class and its .repeat() function. The following is an example of implementing the StringUtils class into your code.

In the following code snippet, we’ll use the StringUtils function with two parameters: the string and the desired repetition count.

Example Code:

import org.apache.commons.lang3.StringUtils;

public class Example3ByZeeshan {
  public static void main(String[] args) {
    String shanii = " Hi Folks! ";
    String Stringrepeated = StringUtils.repeat(shanii, 2);
    System.out.println(Stringrepeated);
  }
}

Output:

Hi Folks! Hi Folks!