exercise7_9.java

Introduction to java programming 一书中所有编程练习部分的源码

public class Exercise7_9 {
    public static void main(String[] args) {
        System.out.println(convertDecimalToHex(16));
        System.out.println(convertDecimalToHex(298));
        System.out.println(convertDecimalToHex(9123));
    }
    
    public static String convertDecimalToHex(int value) {
        StringBuffer buffer = new StringBuffer();
        
        while (value != 0) {
            int number = value % 16;
            char ch = convertToHex(number);
            buffer.insert(0, ch);
            value = value / 16;
        }
        
        return buffer.toString();
    }
    
     public static char convertToHex(int number) {
         if (number == 10) 
             return 'A';
         else if (number == 11) 
             return 'B';
         else if (number == 12) 
             return 'C';
         else if (number == 13) 
             return 'D';
         else if (number == 14) 
             return 'E';
         else if (number == 15) 
             return 'F';

         return (char)(number + '0');
     }
}