Android Utililty Methods Int Overflow Check

List of utility methods to do Int Overflow Check

  1. HOME
  2. Android
  3. I
  4. Int Overflow Check

Description

The list of methods to do Int Overflow Check are organized into topic(s).

Method

intaddAndCheck(int x, int y)
Add two integers, checking for overflow. 
long s = (long) x + (long) y;
if (s < Integer.MIN_VALUE || s > Integer.MAX_VALUE) {
    throw new MathArithmeticException(
            LocalizedFormats.OVERFLOW_IN_ADDITION, x, y);
return (int) s;
intconstrain(int value, int min, int max)
constrain 
if (value > max) {
    return max;
} else if (value < min) {
    return min;
} else {
    return value;
intmulAndCheck(int x, int y)
Multiply two integers, checking for overflow. 
long m = ((long) x) * ((long) y);
if (m < Integer.MIN_VALUE || m > Integer.MAX_VALUE) {
    throw new MathArithmeticException();
return (int) m;
longstirlingS2(final int n, final int k)
Returns the Stirling number of the second kind, " S(n,k) ", the number of ways of partitioning an n -element set into k non-empty subsets. 
if (k < 0) {
    throw new NotPositiveException(k);
if (k > n) {
    throw new NumberIsTooLargeException(k, n, true);
long[][] stirlingS2 = STIRLING_S2.get();
if (stirlingS2 == null) {
...
intsubAndCheck(int x, int y)
Subtract two integers, checking for overflow. 
long s = (long) x - (long) y;
if (s < Integer.MIN_VALUE || s > Integer.MAX_VALUE) {
    throw new MathArithmeticException(
            LocalizedFormats.OVERFLOW_IN_SUBTRACTION, x, y);
return (int) s;
intmultiply(int x, int y)
Multiply two fixed-point values. 
long z = (long) x * (long) y;
return ((int) (z >> 16));
intmultiply(int x, int y)
Multiply two fixed-point values. 
long z = (long) x * (long) y;
return ((int) (z >> 16));
intsqrt(int n)
Find the sqrt of a fixed-point value. 
int s = (n + 65536) >> 1;
for (int i = 0; i < 8; i++) {
    s = (s + divide(n, s)) >> 1;
return s;
intdivide(int x, int y)
Divide two fixed-point values. 
long z = (((long) x) << 32);
return (int) ((z / y) >> 16);