Java: Remove leading zeros from a given IP address

Last update on May 24 2025 12:59:02 (UTC/GMT +8 hours)

10. Remove Leading Zeros from IP

Write a Java program to remove leading zeros from a given IP address.

Sample Solution:

Java Code:

import java.util.*;
public class test {
 
   public static void main(String[] args) {
	     
	    System.out.println(validate("216.08.094.196"));
		System.out.println(validate("08.008.0008.00008"));
		System.out.println(validate("01.102.103.104"));
        }

   public static String validate(String ip) {
          return ip.replaceAll("(?<=^|\\.)0+(?!\\.|$)","");
   }
}

Sample Output:

216.8.94.196
8.8.8.8
1.102.103.104

Pictorial Presentation:

Flowchart :

For more Practice: Solve these Related Problems:

• Write a Java program to remove leading zeros from each octet of an IP address using regex replacement.
• Write a Java program to parse an IP address string and normalize it by stripping out extra zeros.
• Write a Java program to implement a method that converts an IP address with padded zeros into its standard form.
• Write a Java program to compare two IP addresses by first removing leading zeros and then performing a lexicographical comparison.

Go to:

• Java Regular Expression Exercises Home ↩
• Java Exercises Home ↩

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Java Code Editor:

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