Question

How to remove trailing zeros from a string in Java

Answer 1

public class Main {
    public static String removeTrailingZeros(String str) {
        // Find the position of the last non-zero character
        int end = str.toString().lastIndexOf('0');
        while (end > 0 && str.charAt(end) == '0') {
            end--;
        }

        // Erase all characters after the last non-zero character
        if (end != -1) {
            str = str.substring(0, end + 1);
        } else {
            // If the string is all zeros, erase the entire string
            str = "";
        }

        return str.toString();
    }

    public static void main(String[] args) {
        String str = "457833.8591000";

        str = removeTrailingZeros(str);

        System.out.println(str);
    }
}



/*
run:

457833.8591

*/

 

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Answer 2

public class Main {
    public static String removeTrailingZeros(String str) {
        StringBuilder sb = new StringBuilder(str);
        
        while (sb.length() > 0 && sb.charAt(sb.length() - 1) == '0') {
            sb.setLength(sb.length() - 1);
        }
        
        return sb.toString();
    }

    public static void main(String[] args) {
        String str = "457833.8591000";

        str = removeTrailingZeros(str);

        System.out.println(str);
    }
}



/*
run:

457833.8591

*/

 

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Answer 3

public class Main {
    public static String removeTrailingZeros(String str) {
        int index;
        for (index = str.length() - 1; index >= 0; index--) {
            if (str.charAt(index) != '0') {
                break;
            }
        }
        
        return str.substring(0, index + 1);
    }

    public static void main(String[] args) {
        String str = "457833.8591000";

        str = removeTrailingZeros(str);

        System.out.println(str);
    }
}



/*
run:

457833.8591

*/

 

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Answer 4

import java.math.BigDecimal;

public class Main {
    public static String removeTrailingZeros(String str) {
        return new BigDecimal(str).stripTrailingZeros().toPlainString();
    }

    public static void main(String[] args) {
        String str = "457833.8591000";

        str = removeTrailingZeros(str);

        System.out.println(str);
    }
}



/*
run:

457833.8591

*/

 

70+ SQL courses for beginners and professionals

Answer 5

class Main {
    public static void main(String[] args) {
        String str = "457833.8591000";
        
        str = removeTrailingZeros(str);

        System.out.println(str);
    }

    public static String removeTrailingZeros(String str) {
        str = str.replaceAll("0*$", ""); // Remove trailing zeros
        str = str.replaceAll("\\.$", ""); // If there's a dot before zeros (.000), remove it too
        
        return str;
    }
}



/*
run:

457833.8591

*/

 

70+ SQL courses for beginners and professionals