49 lines
1.8 KiB
Java
49 lines
1.8 KiB
Java
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package com.jwetherell.algorithms.numbers;
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import java.math.BigDecimal;
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public class Longs {
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public static final String toBinaryUsingDivideAndModulus(long numberToConvert) {
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long longNumber = numberToConvert;
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if (longNumber<0) throw new IllegalArgumentException("Method argument cannot be negative. number="+longNumber);
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StringBuilder builder = new StringBuilder();
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long temp = 0l;
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while (longNumber > 0) {
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temp = longNumber;
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longNumber = temp / 2;
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builder.append(temp % 2);
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}
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return builder.reverse().toString();
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}
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public static final String toBinaryUsingShiftsAndModulus(long numberToConvert) {
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long longNumber = numberToConvert;
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if (longNumber<0) throw new IllegalArgumentException("Method argument cannot be negative. number="+longNumber);
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StringBuilder builder = new StringBuilder();
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long temp = 0l;
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while (longNumber > 0) {
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temp = longNumber;
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longNumber = (temp >> 1);
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builder.append(temp % 2);
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}
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return builder.reverse().toString();
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}
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public static final String toBinaryUsingBigDecimal(long numberToConvert) {
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long longNumber = numberToConvert;
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if (longNumber<0) throw new IllegalArgumentException("Method argument cannot be negative. number="+longNumber);
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StringBuilder builder = new StringBuilder();
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BigDecimal zero = new BigDecimal(0);
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BigDecimal two = new BigDecimal(2);
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BigDecimal number = new BigDecimal(longNumber);
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BigDecimal[] decimals = null;
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while (number.compareTo(zero) > 0) {
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decimals = number.divideAndRemainder(two);
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number = decimals[0];
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builder.append(decimals[1]);
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}
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return builder.reverse().toString();
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}
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}
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