calculator.java

java做的实现四则运算计算器

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import sun.audio.*;
import java.io.*;
import java.util.*;
class frame 
{
	//用于框架的各个变量
	JFrame myframe;//边框类的对象
	JTextArea showresult;//多行文本框的对象
	JButton button[]=new JButton[20];
	JButton buttonx;
	Container con;//容器类的对象
	String str="123456789";
	String strx="点击使用计算器";
	JPanel panel1, panel2, panel3, panel4; //四个面板
	CardLayout card;//定义卡片布局管理器的对象
	JLabel label,labelx,labely;//定义label用来存放图片，labelx用来存放时间，labely用来存放日期
	Dimension screen;//存放屏幕的大小
	Icon picture;//定义一个图标变量用来存放图片
	//用于计算的各个变量
	 int temp1=0,select,count1=0,count2=0,count3=0,leng,shuliang=0;double operator1=0.0,operator2=0.0;
	char operater=' ';
	String ss=" ";
	InputStream in;
	AudioStream as;
	Font ziti;//设置字体
	Time t;
	public frame()
	{
		myframe=new JFrame("标准型计算器");
		t=new Time();
		t.start();
		JMenuBar mb = new JMenuBar(); //菜单条
		myframe.setJMenuBar(mb);
		JMenu m1 = new JMenu("作者");//菜单
		JMenuItem mi = new JMenuItem("孟瑞&&张瑞红");  //菜单项
		mb.add(m1);
		m1.add(mi);
		labelx = new JLabel();//显示时间的标签
		mb.add(labelx);
		labely=new JLabel();//显示日期的标签
		mb.add(labely);
		labely.setText("日期："+t.getdate());
		ziti=new Font("楷体_GB2312",Font.BOLD,20);
		//shuzi=new Font("Times New Roman",Font.BOLD,15);
		buttonx=new JButton(strx);
		buttonx.setForeground(Color.red);
		buttonx.setFont(ziti);
		con = myframe.getContentPane();  //获取内容窗格
        card=new CardLayout();
        con.setLayout(card);
    	picture=new ImageIcon("xiao.gif");
		label = new JLabel(picture); //创建带有指定图片的标签
        panel4=new JPanel(new BorderLayout());
        panel4.add(BorderLayout.CENTER,buttonx);
        panel4.add(BorderLayout.NORTH,label);
        panel3=new JPanel();
		panel3.setLayout(new BorderLayout());
		panel1=new JPanel();
		panel2=new JPanel();
		panel3.setBorder(BorderFactory.createLineBorder(Color.blue)); //设置面板3边框的颜色
		panel2.setLayout(new GridLayout(5, 4, 5, 5));//面板2采用网格布局管理器
		showresult=new JTextArea(2,24);
		showresult.setEditable(false);
		showresult.setBackground(Color.cyan);
		//showresult.setFont(shuzi);
		for(int i=0,j=0;i<12;i++)
		{   
			if((i+1)%4==0)continue;
			button[i]=new JButton(String.valueOf(str.charAt(j)));
			j++;
		}
		button[3]=new JButton("+");button[7]=new JButton("-");
		button[11]=new JButton("*");button[15]=new JButton("/");
		button[12]=new JButton("0");button[13]=new JButton(".");
		button[14]=new JButton("=");button[16]=new JButton("音乐");
		button[17]=new JButton("退格");button[18]=new JButton("清零");button[19]=new JButton("退出");
		eventhandler handler=new eventhandler();
		buttonx.addActionListener(handler); //注册事件监听器
		for(int i=0;i<20;i++)
		{
			button[i].addActionListener(handler);
			button[i].setForeground(Color.red);
			button[i].setBackground(Color.blue);
		}
		panel1.add(showresult);
		for(int i=0;i<20;i++)
		{
			panel2.add(button[i]);
		}
		panel3.add(panel1,BorderLayout.NORTH);
		panel3.add(panel2,BorderLayout.CENTER);
		con.add("2",panel4);
		con.add("1",panel3);
		screen=Toolkit.getDefaultToolkit().getScreenSize();
		myframe.setLocation((screen.width) / 2-125, screen.height-600);
		myframe.setSize(280, 300);
		myframe.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		myframe.setVisible(true);
		while(true)
		{
			labelx.setText("时间："+t.gettime());
			try{
			Thread.sleep(1000);
			}catch(Exception e){}
		}
	}

	class eventhandler implements ActionListener //事件处理类
{
	public void actionPerformed(ActionEvent e)
	{
		if (e.getSource() == buttonx)  //若选择此按键,则进入第二个卡片
			card.next(con);
	if(e.getSource()!=buttonx&&e.getSource()!=button[13]&&e.getSource()!=button[3]&&e.getSource()!=button[7]&&e.getSource()!=button[11]&&e.getSource()!=button[14]&&e.getSource()!=button[15]&&e.getSource()!=button[16]&&e.getSource()!=button[17]&&e.getSource()!=button[18]&&e.getSource()!=button[19])
		{
			count1 = 0; count2 = 0; count3 = 0;
			temp1 = Integer.parseInt(((JButton)e.getSource()).getLabel()); //对获取的数字进行处理
			switch(temp1)
			{
			case 0:
			case 1:
			case 2:
			case 3:
			case 4:
			case 5:
			case 6:
			case 7:
			case 8:
			case 9:showresult.setText(ss+String.valueOf(temp1));
			        ss=showresult.getText();
					leng = ss.length();
			       break;
			}
			
		}
		else if(e.getSource()==button[3])//加
		{
			count1++;
			if(count1==2)
			{
			JOptionPane.showMessageDialog(panel2, "操作错误输入了两次操作数，请重新输入正确的数据：");
			ss=" ";
			}
			else
			{
				operator2=Double.parseDouble(ss.trim());
				switch(operater)
	     		{
		     		case '*':operator1*=operator2;operator2=operator1;break;
		     		case '-':operator1-=operator2;operator2=operator1;break;
		     		case '/':operator1/=operator2;operator2=operator1;break;
	     		}
				if(operater==' '||operater=='+')
				operator1+=operator2;
				//if(operator1==0)
				 //operator1=Double.parseDouble(ss.trim());
				 showresult.setText("");
				 operater='+';
				 ss=" ";
			}
				
		}
		else if(e.getSource()==button[7])//减
		{
			count1++;
			if(count1==2)
			{
			JOptionPane.showMessageDialog(panel2, "操作错误输入了两次操作数，请重新输入正确的数据：");
			ss=" ";
			}
			else
			{
			if(operator2!=0)
			{
			  operator2=Double.parseDouble(ss.trim());
			  switch(operater)
     		  {
	     		   case '*':operator1*=operator2;operator2=operator1;break;
	     		   case '+':operator1+=operator2;operator2=operator1;break;
	     		   case '/':operator1/=operator2;operator2=operator1;break;
     		  }
			  if(operater==' '||operater=='-')
		       operator1-=operator2;
			} 
			if(operater==' '||operater=='-')
		    operator2=Double.parseDouble(ss.trim());
			if(operator1==0)
			   operator1=Double.parseDouble(ss.trim());
			   showresult.setText("");
			   operater='-';
			   ss=" ";
			}
		}
		else if(e.getSource()==button[11])//乘
		{
			count1++;
			if(count1==2)
			{
			JOptionPane.showMessageDialog(panel2, "操作错误输入了两次操作数，请重新输入正确的数据：");
			ss=" ";
			}
			else
			{
				operator2=Double.parseDouble(ss.trim());
	     		switch(operater)
	     		{
		     		case '+':operator1+=operator2;operator2=operator1;break;
		     		case '-':operator1-=operator2;operator2=operator1;break;
		     		case '/':operator1/=operator2;operator2=operator1;break;
	     		}
				if(operater==' '||operater=='*')
				operator1*=operator2;
				if(operator1==0)
				   operator1=Double.parseDouble(ss.trim());
				   showresult.setText("");
				   operater='*';
				   ss=" ";
			}
		}
		else if(e.getSource()==button[13])//小数点
		{
			count2++;
			if(count2==2)
			{
				JOptionPane.showMessageDialog(panel2, "操作错误输入了两次小数点，请重新输入正确的数据：");
			}
			else
			{
			showresult.setText(ss+".");
			ss=showresult.getText();
			}
		}
		else if (e.getSource() == button[14])//等于号
		{      
			switch(operater)
			{
			case '+':
				      operator2=Double.parseDouble(ss.trim());
			          operator1+=operator2;
		              showresult.setText(String.valueOf(operator1).trim());break;
			case '-':
				      operator2=Double.parseDouble(ss.trim());
			          operator1-=operator2;
		              showresult.setText(String.valueOf(operator1).trim());break;
			case '*':
				      operator2=Double.parseDouble(ss.trim());
			          operator1*=operator2;
		              showresult.setText(String.valueOf(operator1).trim());break;
			case '/':
				      operator2=Double.parseDouble(ss.trim());
				      if(operator2==0)
				      {	  
					  JOptionPane.showMessageDialog(panel2, "除数为零，请重新输入除数：");
					  showresult.setText("");
					  ss="";
				      }
				      else
				      {	  
			          operator1/=operator2;
		              showresult.setText(String.valueOf(operator1).trim());
				      }
		              break;          
			}
				
		}
		else if(e.getSource()==button[15])//除
		{
			
			count1++;
			if(count1==2)
			{
			JOptionPane.showMessageDialog(panel2, "操作错误输入了两次操作数，请重新输入正确的数据：");
			ss=" ";
			}
			else
			{
				if(operator2==0)
					operator2=1;
				else if(operator1!=0)
					{
					operator2=Double.parseDouble(ss.trim()); 
					switch(operater)
		     		{
				     		case '*':operator1*=operator2;operator2=operator1;break;
				     		case '+':operator1+=operator2;operator2=operator1;break;
				     		case '-':operator1-=operator2;operator2=operator1;break;
		     		}
					if(operater==' '||operater=='/')
					operator1/=operator2;
					}
				if(operater==' '||operater=='/')
				{
				operator2=Double.parseDouble(ss.trim()); 
				}
				
				if(operator1==0)
				    operator1=Double.parseDouble(ss.trim());
				//if(operator2==0)
				//JOptionPane.showMessageDialog(panel2, "除数为零，请重新输入：");
					showresult.setText("");
				    operater='/';
				    ss=" ";
			}
				
		}
		else if(e.getSource()==button[16])//play
		{
			try{
				 in=new FileInputStream("1.wav");
				 as=new AudioStream(in);
				}
			catch(Exception a){}
				//button[16].setLabel("stop");
				//System.out.println(button[16].getLabel());
				if (shuliang%2==0)
				{
					AudioPlayer.player.start(as);
					button[16].setLabel("停止");
				}
				if (shuliang % 2 != 0)
			   {
					//AudioPlayer.player.stop(as);
					button[16].setLabel("音乐");
					AudioPlayer.player.stop(as);
				}
				shuliang++;
			
					
		}
		else if(e.getSource()==button[17])//退格
		{
			
			count3++;

			StringBuffer str = new StringBuffer(ss);
			str = str.deleteCharAt(leng-count3);
			ss = str.toString();
			showresult.setText(ss);			
		}
		else if(e.getSource()==button[18])//清零
		{
			showresult.setText("");
			temp1=0;
			operator1=0;
			operator2=0;
			ss=" ";
			operater=' ';
			count3 = 0;
		}
		else if(e.getSource()==button[19])//退出
		{
			select=JOptionPane.showConfirmDialog(panel2, "确定要退出吗？","确定",JOptionPane.OK_CANCEL_OPTION,JOptionPane.WARNING_MESSAGE);
	        if(select==JOptionPane.OK_OPTION)
			System.exit(0);
		}
	}
}
}
class Time extends Thread //响应时间类
{
	int h = 0, m = 0, s = 0,year=0,month=0,day=0,week=0;
	public void run()
	{
		Calendar c = Calendar.getInstance();
		h = c.get(Calendar.HOUR_OF_DAY);
		m = c.get(Calendar.MINUTE);
	    s = c.get(Calendar.SECOND);
	    year=c.get(Calendar.YEAR);
	    month=c.get(Calendar.MONTH)+1;
	    day=c.get(Calendar.DAY_OF_MONTH);
	    week=c.get(Calendar.WEEK_OF_MONTH)-1;
		while (true)
		{
			try
			{
				Thread.sleep(1000);
			}
			catch (InterruptedException e) { }
			if (s < 59)
				s += 1;
			else if (m < 59)
			{
				s = 0;
				m += 1;
			}
			else if(h<23)
			{   
				s = 0;
				m = 0;
			    h+=1;
			}
			else
			{ h = 0; m = 0; s = 0; }
		}
	}
	String gettime(){
		return String.valueOf(h)+":"+String.valueOf(m)+":"+String.valueOf(s);
	}
	String getdate()
	{
		return String.valueOf(year)+"-"+String.valueOf(month)+"-"+String.valueOf(day)+"星期："+week;
	}
	
}
public class calculator//计算器类
{
	public static void main(String args[])
	{
		frame f=new frame();
	}
}