bigcalculator.java

java开发的大整数计算器,实现基本的运算,还有sin,cos,tan,cot.

import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;

import javax.swing.*;


public class BigCalculator extends JFrame implements ActionListener,KeyListener
{
	/**
	 * 
	 */
	private static final long serialVersionUID = 5674828548065279645L;

	private JTextField answerTextField;

	private JPanel operatorPanel,countPanel;

	private JButton button[];

	private JLabel formulaLabel;
	
	private JMenuBar mainMenuBar;

	private JMenu optionMenu;
	
	private About about;
	
	private String[] numberString = {"1","2","3","4","5","6","7","8","9","0",//0-9
			"+","-","×","/","=","OFF","X^2",//10-16
			"C","(",")","Bsp",//17-20
			"sin","cos","tan","cot"};//21-25

	private int []index = {17,18,19,20,21,
			0,1 ,2 ,10,22,
			3,4 ,5 ,11,23,
			6,7 ,8 ,12,24,
			15,9 ,16,13,14};

	SeqStack myStack1 = new SeqStack();
	SeqStack myStack2 = new SeqStack();
	SeqStack myStack3 = new SeqStack();
	SeqStack myStack4 = new SeqStack();  

	private static final double pi = Math.PI ; 

	int jtf = 0 ;      
	char c1,c2;
	String str1 = "",str2 = "",str3,str4,str5 = "" ,str7 = "";

	public BigCalculator()
	{
		operatorPanel = new JPanel(new GridLayout(5,5,2,2));
		countPanel = new JPanel(new GridLayout(2,1));
		
		answerTextField = new JTextField("0");
		formulaLabel = new JLabel();
		
		about = new About();

		answerTextField.setFocusable(false);
		answerTextField.setHorizontalAlignment(JTextField.RIGHT);
		formulaLabel.setHorizontalAlignment(JLabel.RIGHT);

		button = new JButton[numberString.length];
		
		mainMenuBar = new JMenuBar();
		optionMenu = new JMenu("选项");
		
		optionMenu.add(new JMenuItem("关于"));
		optionMenu.addSeparator();
		optionMenu.add(new JMenuItem("退出"));
		
		mainMenuBar.add(this.optionMenu);
		
		for(int i = 0;i < numberString.length;i++)
		{
			operatorPanel.add(button[index[i]] = new JButton(numberString[index[i]]));
		}

		countPanel.add(answerTextField);
		countPanel.add(formulaLabel);

		countPanel.setBackground(Color.PINK);
		operatorPanel.setBackground(Color.PINK);
		
		this.setJMenuBar(this.mainMenuBar);
		
		this.add(countPanel,BorderLayout.NORTH);
		this.add(operatorPanel);

		this.setTitle("计算器");
		this.setDefaultCloseOperation(EXIT_ON_CLOSE);
		this.pack();
		this.setLocationRelativeTo(null);
		this.setResizable(false);

		for(JButton b : button)
		{
			b.addActionListener(this);
			b.addKeyListener(this);
		}
		
		for(int i = 0;i < 10;i++)
			button[i].setForeground(Color.BLUE);
		
		for(int i = 10;i < 21;i++)
			button[i].setForeground(Color.RED);
		
		for(int i = 21;i < 25;i++)
			button[i].setForeground(Color.MAGENTA);
		
		optionMenu.getItem(0).addActionListener(this);
		optionMenu.getItem(2).addActionListener(this);
	}

	public void actionPerformed(ActionEvent e)
	{
		for(int i = 0;i < 10;i++)
			if(e.getActionCommand().equals(Integer.toString(i)))
			{
				input1(Integer.toString(i));
				input2(Integer.toString(i));   
				output1();
				output2();
			}

		if(e.getActionCommand() == "tan")
		{
			input1("tan");
			input2("tan"); 
			output1();
			output2(); 
		}
		else if(e.getActionCommand() == "+")
		{
			input1("+");
			input2("+"); 
			output1();
			output2();
		}
		else if(e.getActionCommand() == "-")
		{
			input1("-");
			input2("-"); 
			output1();
			output2();
		}
		else if(e.getActionCommand() == "×")
		{
			input1("×");
			input2("×"); 
			output1();
			output2();
		}
		else if(e.getActionCommand() == "/")
		{
			input1("/");
			input2("/"); 
			output1();
			output2();
		}
		else if(e.getActionCommand() == "cot")
		{
			input1("cot");
			input2("cot"); 
			output1();
			output2(); 
		}
		else if(e.getActionCommand() == "(")
		{
			input1("(");
			input2("(");     
			output1();
			output2();    
		}
		else if(e.getActionCommand() == ")")
		{
			input1(")");
			input2(")");     
			output1();
			output2();      
		}
		else if(e.getActionCommand() == "sin")
		{
			input1("sin");
			input2("sin");     
			output1();
			output2();     
		}
		else if(e.getActionCommand() == "cos")
		{
			input1("cos");
			input2("cos");      
			output1();
			output2();      
		}
		else if(e.getActionCommand() == "X^2")
		{
			input1("^");
			input2("^");
			output1();
			output2();
			input1("2");
			input2("2");
			output1();
			output2();
		}
		else if(e.getActionCommand() == "=")
		{
			input1("=");
			output1();
			str1 = "";
			myStack1.top = 0;
		}
		else if(e.getActionCommand() == "Bsp")
		{
			backSpace();              
		}
		else if(e.getActionCommand()== "C" )
		{
			clear();
		}
		else if(e.getActionCommand()== "OFF" )
		{
			System.exit(0);
		}
		else if(e.getActionCommand()== "OFF" )
		{
			System.exit(0);
		}
		else if(e.getActionCommand()== "退出" )
		{
			System.exit(0);
		}
		else if(e.getActionCommand()== "关于" )
		{
			about.setVisible(true);
		}
	}

	void clear()
	{
		str1 = str2 = str3 = str4  = "";
		myStack1.top = 0;myStack2.top = 0;
		answerTextField.setText("0");
		output1();
		output2();
	}
	public void input1(String s)
	{
		if(!s.equals(new String("+"))&&!s.equals(new String("-"))&&!s.equals(new String("×"))&&!s.equals(new String("/"))
				&&!s.equals(new String("("))&&!s.equals(new String(")"))&&!s.equals(new String("^"))
				&&!s.equals(new String("sin"))&&!s.equals(new String("cos"))&&!s.equals(new String("tan"))&&!s.equals(new String("cot"))
				&&!s.equals(new String("=")))
			str2 += s;
		else
		{
			if(myStack1.top!= myStack1.maxStackSize && myStack2.top!=myStack2.maxStackSize){
				try
				{   
					if(str5 != ")" && str2 != "")
						myStack1.push(str2);   

					copystack(myStack1,myStack3);
					copystack(myStack2,myStack4);    

					if(myStack2.isEmpty())
						myStack2.push(s);
					else
					{
						int zhi1 = fuzhi(myStack2.getTop());
						int zhi2 = fuzhi(s);  
						if(zhi1 == zhi2||(zhi1 == 2 && zhi2 == 1))
						{
							if(zhi1 == zhi2 && s.equalsIgnoreCase("^"))
								myStack2.push(s);
							else
							{
								str4 = myStack1.pop();                   	 
								str3 = myStack1.pop();                    	        
								myStack1.push(evaluate(str3,myStack2.pop(),str4));

								if(myStack2.isEmpty())
									myStack2.push(s);
								else
								{   
									zhi1 =  fuzhi(myStack2.getTop());                    	             
									if(zhi1 == zhi2||(zhi1 == 2 && zhi2 == 1))
									{
										str4 = myStack1.pop();                   	 
										str3 = myStack1.pop();
										myStack1.push(evaluate(str3,myStack2.pop(),str4));                     	          
									}      
									myStack2.push(s);
								}
							}
						}
						else if(zhi2 == 0||zhi1 == 0)
						{
							if(!s.equalsIgnoreCase(")"))
								myStack2.push(s);
						}
						else if(zhi2 == 4)
						{

							str4 = myStack1.pop();
							str3 = myStack1.pop();                                 
							myStack1.push(evaluate(str3,myStack2.pop(),str4));                           
							myStack2.pop();                          
						}
						else if(zhi1 == 1 && zhi2 == 2)
						{
							myStack2.push(s);
						}
						else if(zhi2 == 3)
						{
							myStack2.push(s);
						}
						else if(zhi2 == 5)
						{
							while(!myStack2.isEmpty())
							{
								if(zhi1 != 3){
									str4 = myStack1.pop();
									str3 = myStack1.pop();
									myStack1.push(evaluate(str3,myStack2.pop(),str4));
								}
								else
								{
									str4 = myStack1.pop();                                   
									myStack1.push(evaluate(str4,myStack2.pop(),""));                                   
								}
							}
						}
					}

				}catch(Exception e){}
			}            
			str2 = "";
		}
		str5 = s;            
	}

	public void input2(String s)
	{         
		str1 = str1+s;      
	}

	public void output1()
	{
		if(!myStack1.isEmpty()) 
			try
		{  
				answerTextField.setText(myStack1.getTop());
		}
		catch(Exception e){}