package test;

/**

 * 進位制轉換

 * @author 

 *

 */

public class Test {

private static final int NUM_TWO = 2;

private static final int NUM_EIGHT = 8;

private static final int NUM_HEX = 16;

private static final char[] HEX = {'0','1','2','3','4','5','6','7','8','9',

'a','b','c','d','e'};

/**

 * 得到二進位制

 * @param num

 * @return

 */

public static String getTwo(int num){

StringBuffer sb = new StringBuffer();

int remainder ;//= num % NUM_TWO;//餘數

int quotient ;//= num / NUM_TWO;//商

do{

remainder = num % NUM_TWO;

quotient = num / NUM_TWO;

num = quotient;

sb.insert(0, remainder);

}while(quotient != 0);

return sb.toString();

//return Integer.toBinaryString(num);

}

/**

 * 得到八進位制

 * @param num

 * @return

 */

public static String getEight(int num){

StringBuffer sb = new StringBuffer();

int remainder ;//= num % NUM_EIGHT;//餘數

int quotient ;//= num / NUM_EIGHT;//商

do{

remainder = num % NUM_EIGHT;

quotient = num / NUM_EIGHT;

num = quotient;

sb.insert(0, remainder);

}while(quotient != 0);

return sb.toString();

//return Integer.toOctalString(num);

}

/**

 * 得到十六進位制

 * @param num

 * @return 

 */

public static String getHex(int num){

StringBuffer sb = new StringBuffer();

int remainder ;//= num % NUM_HEX;//餘數

int quotient ;//= num / NUM_HEX;//商

do{

remainder = num % NUM_HEX;

quotient = num / NUM_HEX;

num = quotient;

sb.insert(0, HEX[remainder]);

}while(quotient != 0);

return sb.toString();





//return Integer.toHexString(num);

}

public static void main(String[] args) {

int num = 11;

System.out.println("十進位制數："+num);

System.out.println("二進位制為："+getTwo(num));

System.out.println("八進位制為："+getEight(num));

System.out.println("十六進位制為："+getHex(num));

}

}