Java Utililty Methods Number Round

List of utility methods to do Number Round

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Description

The list of methods to do Number Round are organized into topic(s).

Method

doubleroundUp(double val)
round Up 
int exponent = (int) Math.floor(Math.log10(val));
val *= Math.pow(10, -exponent);
if (val > 5.0)
    val = 10.0;
else if (val > 2.0)
    val = 5.0;
else if (val > 1.0)
    val = 2.0;
...
doubleroundUp(double val)
round Up 
int exponent = (int) Math.floor(Math.log10(val));
val *= Math.pow(10, -exponent);
if (val > 5.0)
    val = 10.0;
else if (val > 2.0)
    val = 5.0;
else if (val > 1.0)
    val = 2.0;
...
doubleroundUp(final double val)
Given a number, round up to the nearest power of ten times 1, 2, or 5. 
int exponent = (int) Math.floor(Math.log10(val));
double rval = val * Math.pow(10, -exponent);
if (rval > 5.0) {
    rval = 10.0;
} else if (rval > 2.0) {
    rval = 5.0;
} else if (rval > 1.0) {
    rval = 2.0;
...
introundUp(final int number, final int base)
Rounds an integer division to the nearest integer. 
return (number + base - 1) / base;
longRoundUp(final T number)
Returns a long number by round up with specify number.
Returns 0 if number == null.
e.g: average is 3.5, then return 4. 
if (number == null) {
    return 0;
double value = number.doubleValue();
if (value % 1 == 0) {
    return (long) value;
} else {
    return (long) (value + 1);
...
introundUp(int capacity)
round Up 
int tz = 32 - Integer.numberOfLeadingZeros(capacity - 1);
return 1 << tz;
introundUp(int dividend, int divisor)
round Up 
int remainder = dividend % divisor;
dividend -= remainder;
if (remainder * 2 > divisor) {
    dividend += divisor;
return dividend;
introundUp(int groupSize, int globalSize)
round Up 
int r = globalSize % groupSize;
if (r == 0) {
    return globalSize;
} else {
    return globalSize + groupSize - r;
introundUp(int groupSize, int globalSize)
rounded up to the nearest multiple of the groupSize 
int r = globalSize % groupSize;
if (r == 0) {
    return globalSize;
} else {
    return globalSize + groupSize - r;
introundUp(int i, int snap)
round Up 
return roundDown(i + snap - 1, snap);