class Example {
    public static void main(String[] args){
        String rx = "\\.0*$|(?<=\\.[0-9]{0,2147483646})0*$";
        System.out.println("1".replaceAll(rx, ""));
        System.out.println("1000".replaceAll(rx, ""));
        System.out.println("0.0".replaceAll(rx, ""));
        System.out.println("1.01".replaceAll(rx, ""));
        System.out.println("1.10".replaceAll(rx, ""));
        System.out.println("1.100".replaceAll(rx, ""));
        System.out.println("-12345.0123456000".replaceAll(rx, ""));
    }
}

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