Round a value to integer

static long round(double a)
Returns the closest long to a.
static int round(float a)
Returns the closest int to a.

public class Main {
  public static void main(String[] args) {

    System.out.println(Math.round(1.2));
    System.out.println(Math.round(1.9));
  }
}

The output: 


1
2

Round Java float and double numbers using Math.round


public class Main {
  public static void main(String[] args) {
    System.out.println(Math.round(1.3f));
    System.out.println(Math.round(2.5f));
    System.out.println(Math.round(2.5f));
    System.out.println(Math.round(-9.4f));
    System.out.println(Math.round(-3.5f));
  }
}

The output:


1
3
3
-9
-3
Home 
  Java Book 
    Essential Classes  

Math:
  1. Math class
  2. Constant E and PI
  3. Get the absolute value
  4. sin, cos, tan: Trigonometric functions
  5. Cube root and square root
  6. Ceilling and flooring value
  7. Copy sign
  8. Raise the power
  9. Get exponent
  10. sqrt(x2 +y2)
  11. IEEE remainder
  12. logarithm
  13. Max, min value
  14. Next value
  15. Math Random
  16. Round to int to double
  17. Round a value to integer
  18. value * 2^ scaleFactor
  19. Get the sign
  20. Degree to Radian, and Radian to Degree
  21. Returns the size of an ulp of the argument