How to round off value in java

I want to round off the value if the decimal point is above 1. For example,

23/10 = 2.3 -> roundoff to 3
11/10 = 1.1 -> roundoff to 2
15/10 = 1.5 -> roundoff to 2
67/10 = 6.7 -> roundoff to 7
1738/10 = 173.8 -> roundoff to 174

How can I do this in Java, I tried couple of approach but not working as expected.
Please find my sample code below

public class Test {

    private static final DecimalFormat df = new DecimalFormat("0.00");

    public static void main(String[] args) {
        float a = 23;
        float b = 10;
        float k = a / b;
        System.out.println(k);
        float roundOff = Math.round(k*100)/100;
        System.out.println(roundOff);
    }

}

>Solution :

Use the Math library, do not reinvent the wheel.

private int roundUp(float value){
    return (int) Math.ceil(value);
}