package cn.edu.bjut.chapter2;

public class Ipc {
	public static void main(String[] args) {
		final char SEPARATOR = '/';
		
		{
			char section = 'A';
			int mainClass = 4;
			char subclass = 'B';
			int mainGroup = 55;
			int subgroup = 56;

			String classification = section 
                                        + String.format("%2s", mainClass).replace(' ', '0') 
                                        + subclass + String.format("%4s", mainGroup) 
                                        + SEPARATOR + subgroup;

			System.out.println(classification);
		}
		
		{
			String classification = "A04B  55/56"; 
			char section = classification.charAt(0); 
			int mainClass = Integer.parseInt(classification.substring(1, 3)); 
			char subclass = classification.charAt(3); 
			int pos = classification.indexOf(SEPARATOR); 
			int mainGroup = Integer.parseInt(classification.substring(4, pos).trim()); 
			int subgroup = Integer.parseInt(classification.substring(pos + 1)); 
			
			System.out.println(section + "\t" + mainClass + "\t" 
                                        + subclass + "\t" + mainGroup + "\t" 
                                        + subgroup); 
		}
	}
}