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
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 stringimport 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++
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