



Remove Leading Zeros From String in Java


Given a string of digits, remove leading zeros from it.
Examples:


Input : 00000123569

Output : 123569



Input : 000012356090

Output : 12356090




Recommended: Please try your approach on {IDE} first, before moving on to the solution.

We use StringBuffer class as Strings are immutable.
1) Count leading zeros.
2) Use StringBuffer replace function to remove characters equal to above count. 







 


 

 













// Java program to remove leading/preceding zeros 
// from a given string 
import java.util.Arrays; 
import java.util.List; 
  
/* Name of the class to remove leading/preceding zeros */
class RemoveZero 
{ 
    public static String removeZero(String str) 
    { 
        // Count leading zeros 
        int i = 0; 
        while (i < str.length() && str.charAt(i) == '0') 
            i++; 
  
        // Convert str into StringBuffer as Strings 
        // are immutable. 
        StringBuffer sb = new StringBuffer(str); 
  
        // The  StringBuffer replace function removes 
        // i characters from given index (0 here) 
        sb.replace(0, i, ""); 
  
        return sb.toString();  // return in String 
    } 
  
    // Driver code 
    public static void main (String[] args) 
    { 
        String str = "00000123569"; 
        str = removeZero(str); 
        System.out.println(str); 
    } 
} 


















Output:


123569


Remove leading Zeros From string in C++
This article is contributed by Mr. Somesh Awasthi. If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.
Please write comments if you find anything incorrect, or you want to share more information about the topic discussed above.





Improved By :  Sanjeev Kumar Jha







 


 

 
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