java-algorithms-implementation/src/com/jwetherell/algorithms/numbers/Longs.java at master · phishman3579/java-algorithms-implementation · GitHub

Name: java-algorithms-implementation/src/com/jwetherell/algorithms/numbers/Longs.java at master · phishman3579/java-algorithms-implementation · GitHub
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packagecom.jwetherell.algorithms.numbers;

importjava.math.BigDecimal;

publicclassLongs {

publicstaticfinalStringtoBinaryUsingDivideAndModulus(longnumberToConvert) {
longlongNumber = numberToConvert;
if (longNumber<0) thrownewIllegalArgumentException("Method argument cannot be negative. number="+longNumber);
StringBuilderbuilder = newStringBuilder();
longtemp = 0l;
while (longNumber > 0) {
temp = longNumber;
longNumber = temp / 2;
builder.append(temp % 2);
 }
returnbuilder.reverse().toString();
 }

publicstaticfinalStringtoBinaryUsingShiftsAndModulus(longnumberToConvert) {
longlongNumber = numberToConvert;
if (longNumber<0) thrownewIllegalArgumentException("Method argument cannot be negative. number="+longNumber);
StringBuilderbuilder = newStringBuilder();
longtemp = 0l;
while (longNumber > 0) {
temp = longNumber;
longNumber = (temp >> 1);
builder.append(temp % 2);
 }
returnbuilder.reverse().toString();
 }

publicstaticfinalStringtoBinaryUsingBigDecimal(longnumberToConvert) {
longlongNumber = numberToConvert;
if (longNumber<0) thrownewIllegalArgumentException("Method argument cannot be negative. number="+longNumber);
StringBuilderbuilder = newStringBuilder();
BigDecimalzero = newBigDecimal(0);
BigDecimaltwo = newBigDecimal(2);
BigDecimalnumber = newBigDecimal(longNumber);
BigDecimal[] decimals = null;
while (number.compareTo(zero) > 0) {
decimals = number.divideAndRemainder(two);
number = decimals[0];
builder.append(decimals[1]);
 }
returnbuilder.reverse().toString();
 }
}