test.java

基于算符优先关心的

import java.text.DecimalFormat;
import java.util.Scanner;

import parser.*;

import parser.Calculator;

public class Test {

	public static void main(String[] args) {
		try {
			Calculator c = new Calculator();
			Scanner s = new Scanner(System.in);
			String expression = s.nextLine();
//			c.calculate(expression);
			
			Parser p = new Parser(expression);
		    double v = 	p.parse();
		    
		    String str = (new DecimalFormat("###,###,###,###.####")).format(v);
		    
		    
//		    Class m =  Class.forName("java.lang.Double"); 
//		    
//		    Object e  = m.newInstance();
//		    
//		   System.out.println( e.getClass().getSimpleName());
		    
		    System.out.println(str);
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

}