一个java计算器，请帮我看看哪里有不足和改进之处

[vipstepstep]

package com.core;

import javax.swing.*;
import java.awt.*;
import static com.js.util.SwingConsole.*;

public class MyCal extends JFrame
{
	static TextPanel tp = new TextPanel(new BorderLayout());
	private ButtonPanel bp = new ButtonPanel(new GridLayout(4, 4, 2, 2));
	
	public MyCal()
	{
		add(tp, BorderLayout.NORTH);
		add(bp, BorderLayout.CENTER);
	}
	
	public static void main(String[] args) 
	{
		run(new MyCal(), 400, 350);
	}
	
	
}


package com.core;

import java.awt.event.*;
import java.util.ArrayList;
import com.js.util.*;

import javax.swing.JButton;
import javax.swing.JOptionPane;


public class ManyListeners 
{
	private StringBuilder totalNum = new StringBuilder();
	
	
	private Boolean flagNum = false;
	private Boolean flagPoint = false;
	
	
	private Stack<Character> stackErrCom = new Stack<Character>();
	private ArrayList<Float> af = new ArrayList<Float>();
	
	class NumberListener implements ActionListener
	{
		public void actionPerformed(ActionEvent e) 
		{
			
			if (false == flagNum)
				totalNum.delete(0, 20);
			
			flagNum = true;
			String name = ((JButton)e.getSource()).getText();
			
			totalNum.append(name);
			MyCal.tp.text.setText(totalNum.toString());
						
		}
	}
	
	
	private void operatorLogic(Character c, String s)
	{
		try {
			af.add(new Float(totalNum.toString()));
		}
		catch (NumberFormatException nfe) {
			JOptionPane.showMessageDialog(
					null, "先按数字键并且不要连续按", "吓死你", 
					JOptionPane.ERROR_MESSAGE
						);
			return;
		}
		stackErrCom.push(c);
		MyCal.tp.text.setText(s);
		totalNum.delete(0, 20);
		flagPoint = false;
		
	}
	
	class PlusListener implements ActionListener 
	{
		public void actionPerformed(ActionEvent e) 
		{
			operatorLogic('+', "+");
		}
	}
	
	class DivideListener implements ActionListener 
	{
		public void actionPerformed(ActionEvent e)
		{
			operatorLogic('/', "/");
		}
	}
	
	class MultiplyListener implements ActionListener 
	{
		public void actionPerformed(ActionEvent e)
		{
			operatorLogic('*', "*");
		}
	}
	
	class MinusListener implements ActionListener 
	{
		public void actionPerformed(ActionEvent e)
		{
			operatorLogic('-', "-");
		}
	}
	
	class EqualsListener implements ActionListener
	{
		
		private String filtrate(Float f1)
		{
			
			Integer n1 = f1.intValue();
			Float fn1 = n1.floatValue();
			
			if (f1 - fn1 == 0) {
				
				return n1.toString();
			}
			else {
				return f1.toString();
			}
		}
		
		public void actionPerformed(ActionEvent e) 
		{
			Character ADD = '+';
			Character DIVIDE = '/';
			Character MUL = '*';
			Character MIN = '-';
			Float totalF = 0.0f;
			String result = null;
			
			af.add(new Float(totalNum.toString()));
			totalNum.delete(0, 20);
			
			while (!stackErrCom.empty()) {
				
				if ((stackErrCom.peek()).equals(ADD)) {
					
					totalF = af.get(0) + af.get(1);
					af.set(1, totalF);
					af.remove(0);
				}
				
				if ((stackErrCom.peek()).equals(DIVIDE)) {
					
					totalF = af.get(0) / af.get(1);
					af.set(1, totalF);
					af.remove(0);
				}
				
				if ((stackErrCom.peek()).equals(MUL)) {
					
					totalF = af.get(0) * af.get(1);
					af.set(1, totalF);
					af.remove(0);
				}
				
				if ((stackErrCom.peek()).equals(MIN)) {
					
					totalF = af.get(0) - af.get(1);
					af.set(1, totalF);
					af.remove(0);
				}
				
				stackErrCom.pop();
				
			}
			
			result = filtrate(totalF);
			MyCal.tp.text.setText(result);
			
			flagPoint = false;
			af.clear();
			
			totalNum.append(result);
			flagNum = false;
			
		}
	}
		
	class PointListener implements ActionListener
	{
		
		public void actionPerformed(ActionEvent e) 
		{
			if (flagNum && !flagPoint) {
				totalNum.append(".");
				MyCal.tp.text.setText(totalNum.toString());
				flagPoint = true;
			}
			else {
				try {
					throw new PointException("小数点的烦恼");
				} catch (PointException e1) {
					JOptionPane.showMessageDialog(
							null, "先按数字键并不能按下多个小数点", "吓死你", 
							JOptionPane.ERROR_MESSAGE
								);
				}
			}
		}
	}
	
	private class PointException extends Exception
	{
		public PointException()
		{
			
		}
		public PointException(String str)
		{
			
		}
	}
	
	
}





package com.core;

import javax.swing.*;
import java.awt.*;





public class ButtonPanel extends JPanel
{
	private JButton
		b1 = new JButton("1"),
		b2 = new JButton("2"),
		b3 = new JButton("3"),
		b4 = new JButton("4"),
		b5 = new JButton("5"),
		b6 = new JButton("6"),
		b7 = new JButton("7"),
		b8 = new JButton("8"),
		b9 = new JButton("9"),
		b0 = new JButton("0"),
		bPlus = new JButton("+"),
		bMinus = new JButton("-"),
		bMultiply = new JButton("*"),
		bDivide = new JButton("/"),
		bEquals = new JButton("="),
		bPoint = new JButton(".");
	private Font font = new Font("Arial Bold", Font.BOLD, 16);
	private Font font1 = new Font("Arial Bold", Font.BOLD, 22);
	
	private ManyListeners ml = new ManyListeners();
	private ManyListeners.NumberListener nl = ml.new NumberListener();
	private ManyListeners.PlusListener pl = ml.new PlusListener();
	private ManyListeners.EqualsListener el = ml.new EqualsListener();	
	private ManyListeners.PointListener pol = ml.new PointListener();
	private ManyListeners.DivideListener dl = ml.new DivideListener();
	private ManyListeners.MultiplyListener mul = ml.new MultiplyListener();
	private ManyListeners.MinusListener mil = ml.new MinusListener();
	
	public ButtonPanel(GridLayout gl)
	{
		super(gl);
		add(b1);add(b2);add(b3);add(b4);add(b5);add(b6);
		add(b7);add(b8);add(b9);add(b0);add(bPlus);
		add(bMinus);add(bMultiply);add(bDivide);add(bEquals);
		add(bPoint);
		
		b1.setFont(font);
		b2.setFont(font);
		b3.setFont(font);
		b4.setFont(font);
		b5.setFont(font);
		b6.setFont(font);
		b7.setFont(font);
		b8.setFont(font);
		b9.setFont(font);
		b0.setFont(font);
		bPlus.setFont(font1);
		bMinus.setFont(font1);
		bDivide.setFont(font1);
		bEquals.setFont(font1);
		bPoint.setFont(font1);
		bMultiply.setFont(font1);
		
		b1.addActionListener(nl);
		b2.addActionListener(nl);
		b3.addActionListener(nl);
		b4.addActionListener(nl);
		b5.addActionListener(nl);
		b6.addActionListener(nl);
		b7.addActionListener(nl);
		b8.addActionListener(nl);
		b9.addActionListener(nl);
		b0.addActionListener(nl);
		bPlus.addActionListener(pl);
		bEquals.addActionListener(el);
		bPoint.addActionListener(pol);
		bDivide.addActionListener(dl);
		bMultiply.addActionListener(mul);
		bMinus.addActionListener(mil);
	}
}




package com.core;

import javax.swing.*;

import java.awt.*;

public class TextPanel extends JPanel
{
	static JTextField text = new JTextField();
	private Font font2 = new Font("Arial Bold", Font.BOLD, 22);
	
	public TextPanel(BorderLayout bl)
	{
		super(bl);
		text.setEditable(false);
		text.setHorizontalAlignment(JTextField.RIGHT);
		text.setFont(font2);
		add(text);
	}
}






package com.js.util;
import java.util.LinkedList;

public class Stack<T> {
  private LinkedList<T> storage = new LinkedList<T>();
  public void push(T v) { storage.addFirst(v); }
  public T peek() { return storage.getLast(); }
  public T pop() { return storage.removeLast(); }
  public boolean empty() { return storage.isEmpty(); }
  public String toString() { return storage.toString(); }
} ///:~






package com.js.util;

import javax.swing.*;

public class SwingConsole 
{
	public static void 
	run(final JFrame f, final int width, final int height)
	{
		SwingUtilities.invokeLater(new Runnable()
		{
			@Override
			public void run() {
				// TODO Auto-generated method stub
				f.setTitle(f.getClass().getSimpleName());
				f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
				f.setSize(width, height);
				f.setVisible(true);
				f.setResizable(false);
			}
		}
				);
	}
}

[tony4geek]

自己看看，自己检查，。

[vipstepstep]

请帮我看看，不足和改进之处

[vipstepstep]

来人吧，来人吧

[ghx287524027]

我勒个去，估计很少有人这么看的

[美丽De意外]

没注释啊

[筑梦工程师]

你可以把你整个项目发上来，这么一段段的代码谁都看不出来

[vipstepstep]

我不应该去捕获runtimeException