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Merged
yanglbme merged 1 commit into from
Oct 20, 2019
Merged

DecimalToAnyUsingStack #1089

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44 changes: 44 additions & 0 deletions DataStructures/Stacks/DecimalToAnyUsingStack.java
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Original file line number Diff line number Diff line change
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package DataStructures.Stacks;

import java.util.Stack;

public class DecimalToAnyUsingStack {
public static void main(String[] args) {
assert convert(0, 2).equals("0");
assert convert(30, 2).equals("11110");
assert convert(30, 8).equals("36");
assert convert(30, 10).equals("30");
assert convert(30, 16).equals("1E");
}

/**
* Convert decimal number to another radix
*
* @param number the number to be converted
* @param radix the radix
* @return another radix
* @throws ArithmeticException if <tt>number</tt> or <tt>radius</tt> is invalid
*/
private static String convert(int number, int radix) {
if (radix < 2 || radix > 16) {
throw new ArithmeticException(
String.format("Invalid input -> number:%d,radius:%d", number, radix));
}
char[] tables = {
'0', '1', '2', '3', '4',
'5', '6', '7', '8', '9',
'A', 'B', 'C', 'D', 'E', 'F'
};
Stack<Character> bits = new Stack<>();
do {
bits.push(tables[number % radix]);
number = number / radix;
} while (number != 0);

StringBuilder result = new StringBuilder();
while (!bits.isEmpty()) {
result.append(bits.pop());
}
return result.toString();
}
}