其他一些工具类和MAIN

package cross.pauliuyou.calculator.base;

import java.util.Vector;

/**
*
* @author 刘优
* @version 1.1
*
*
*
* */
public class Queue<T> {
       
    private Vector<T> content;
   
    public Queue() {
        content = new Vector<T>();
       
    }
    public void add(T t) {
        content.add(t);
    }
    public T peek() {
        if (content.size() == 0) {
            return null;
        }
        return content.get(0);
    }
    public T get() {
        if (content.size() == 0) {
            return null;
        }
        return content.remove(0);
    }
    public int size() {
        return content.size();
    }
    public String toString() {
        return content.toString();
    }
   
}


package cross.pauliuyou.calculator.base;

import java.util.Vector;

/**
*
* @author 刘优
* @version 1.1
*
*
*
* */

public class Stack<T> {
   
    private Vector<T> content;
   
    public Stack() {
        content = new Vector<T>();
       
    }
    public void push(T t) {
        content.add(t);
    }
    public T peek() {
        if (content.size() == 0) {
            return null;
        }
        return content.get(content.size() - 1);
    }
    public T pop() {
        if (content.size() == 0) {
            return null;
        }
        return content.remove(content.size() - 1);
    }
    public int size() {
        return content.size();
    }
    public String toString() {
        return content.toString();
    }
   
}


package cross.pauliuyou.calculator.base;

/**
*
* @author 刘优
* @version 1.1
*
*
*
*
* */

public class CalculateException extends Exception {
    public CalculateException(String infor) {
        super(infor);
    }
}
package cross.pauliuyou.calculator.main;

import cross.pauliuyou.calculator.ui.CalculatorJFrame;

public class Main {

    /**
     * @param args
     */
    public static void main(String[] args) {
        new CalculatorJFrame();

    }

}