简单的图形用户界面—简单计算器的实现

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简单的图形用户界面—简单计算器的实现

今天把Java实验报告上交了，其中一个是设计一个简单的计算器。现在就发表下自己写的一个简单的计算器，嘿嘿，个人感觉界面挺丑的，不过基本的加减乘除是可以实现的，下面的代码都是自己学过的类和方法，很基础，本人也是刚入门，如果不好，希望大家凑合看下哈，嘿嘿，先上图：

代码附上各位互相交流哈！

/**  * @Author Chen Chao in ZJNU * @Date   2014-06-08 *   */ import java.awt.Color;import java.awt.Font;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.swing.ImageIcon;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JTextField; public class CalcullatorApp extends JFrame implements ActionListener{String temp ="";float num2;float num1;int flag;JTextField ioput;    JButton one,two ,thr,fo,fi,six,seven,ei,nine,z,btn_jia,btn_jian,btn_cheng,btn_chu,btn_deng,c,sin,cos,tan,back,zf,dian;public CalcullatorApp(){setSize(300, 200);setTitle("MyCalculator");setResizable(false);//setBounds(300, 400, 300, 400);setLayout(null);ioput = new JTextField();ioput.setBounds(5,5,285,25);ioput.setHorizontalAlignment(JTextField.RIGHT);    ioput.setText("");    ioput.setForeground(Color.GREEN);    ioput.setFont(new Font("SansSerif", Font.BOLD, 20));     add(ioput);     //输出框布局     one = new JButton("1");     one.addActionListener(this);     one.setBounds(10, 35, 45, 16);          two = new JButton("2");     two.addActionListener(this);     two.setBounds(60, 35, 45, 16);          thr = new JButton("3");     thr.addActionListener(this);     thr.setBounds(110, 35, 45, 16);          btn_jia = new JButton("+");     btn_jia.addActionListener(this);     btn_jia.setBounds(245, 35, 45, 16);          c = new JButton("C");     c.addActionListener(this);     c.setBounds(180, 35, 55, 16);          //第一行布局     fo = new JButton("4");     fo.addActionListener(this);     fo.setBounds(10, 65, 45, 16);          fi = new JButton("5");     fi.addActionListener(this);     fi.setBounds(60, 65, 45, 16);          six = new JButton("6");     six.addActionListener(this);     six.setBounds(110, 65, 45, 16);          btn_jian = new JButton("-");     btn_jian.addActionListener(this);     btn_jian.setBounds(245, 65, 45, 16);          sin = new JButton("sin");     sin.addActionListener(this);     sin.setBounds(180, 65, 55, 16);     //第二行布局     seven = new JButton("7");     seven.addActionListener(this);     seven.setBounds(10, 95, 45, 16);          ei = new JButton("8");     ei.addActionListener(this);     ei.setBounds(60, 95, 45, 16);          nine = new JButton("9");     nine.addActionListener(this);     nine.setBounds(110, 95, 45, 16);          btn_cheng= new JButton("*");     btn_cheng.addActionListener(this);     btn_cheng.setBounds(245, 95, 45, 16);          cos= new JButton("cos");     cos.addActionListener(this);     cos.setBounds(180, 95, 55, 16);     //第三行布局     z = new JButton("0");     z.addActionListener(this);     z.setBounds(10, 125, 45, 16);     //     btn_deng= new JButton("=");//     btn_deng.addActionListener(this);//     btn_deng.setBounds(60, 125, 45, 16);          back= new JButton("←");     back.addActionListener(this);     back.setBounds(108, 125, 48, 16);          tan= new JButton("tan");     tan.addActionListener(this);     tan.setBounds(180, 125, 55, 16);          btn_chu= new JButton("/");     btn_chu.addActionListener(this);     btn_chu.setBounds(245, 125, 45, 16);     //第四行布局     zf= new JButton("+/-");     zf.addActionListener(this);     zf.setBounds(10, 150, 70, 20);          dian= new JButton(".");     dian.addActionListener(this);     dian.setBounds(85, 150, 70, 20);          btn_deng= new JButton("=");     btn_deng.addActionListener(this);     btn_deng.setBounds(180, 150, 110, 20);     //第五行布局     add(one);    add(two);   add(thr);  add(c);  add(btn_jia);      add(fo);     add(fi);    add(six);  add(sin); add(btn_jian);     add(seven);  add(ei);     add(nine); add(cos); add(btn_cheng);     add(z);       add(back); add(tan); add(btn_chu);     add(zf);      add(dian);   add(btn_deng);    }  //-----------------------------------------------------------------------------     @Overridepublic void actionPerformed(ActionEvent e1){JButton btn = (JButton) e1.getSource();if(btn==one||btn==two||btn==thr||btn==fo||btn==fi||btn==six||btn==seven||btn==ei||btn==nine||btn==z||btn==dian){temp = temp +e1.getActionCommand(); ioput.setText(String.valueOf(temp));}if(btn == btn_jia||btn==btn_jian||btn==btn_cheng||btn==btn_chu||btn==cos||btn==sin||btn==tan){if(btn == btn_jia){flag = 1;num1=Float.parseFloat(ioput.getText());}if(btn==btn_jian){flag = 2;num1=Float.parseFloat(ioput.getText());}if(btn==btn_cheng){flag = 3;num1=Float.parseFloat(ioput.getText());}if(btn==btn_chu){flag = 4;num1=Float.parseFloat(ioput.getText());}if(btn==sin){flag= 5;num1=Float.parseFloat(ioput.getText());}if(btn == cos){flag =6;num1 = Float.parseFloat(ioput.getText());}if(btn == tan){flag = 7;num1 = Float.parseFloat(ioput.getText());}temp = "";}if(btn == btn_deng){num2=Float.parseFloat(ioput.getText());if(flag == 1){num1 = num1 + num2;ioput.setText(String.valueOf(num1));}if(flag == 2){num1 = num1-num2;ioput.setText(String.valueOf(num1));}if(flag ==3){num1= num1*num2;ioput.setText(String.valueOf(num1));}if(flag == 4){//try{num1 = num1/num2;if(num2==0){ioput.setText("除数不能为0");}elseioput.setText(String.valueOf(num1));//}//catch(ArithmeticException e)//{//ioput.setText("除数为0无意义");//}}if(flag == 5){num1 = (float) Math.sin(num2);ioput.setText(String.valueOf(num1));}if(flag == 6){num1 = (float) Math.cos(num2);ioput.setText(String.valueOf(num1));}temp="";}//-----------------------------------------if(btn == c){temp="";ioput.setText("");}//置空if(btn == back){try{temp = temp.substring(0,temp.length()-1);ioput.setText(String.valueOf(temp));}catch(StringIndexOutOfBoundsException e){ioput.setText("字符索引越界异常！！！");}}   //回格if(btn == zf){if(ioput.getText().isEmpty()==false)        {          Float lnum=-(Float.parseFloat(ioput.getText()));          ioput.setText(Double.toString(lnum));        }        else        {        ioput.setText("-");        }}//输入负数}public static void main(String[] args){CalcullatorApp ca = new CalcullatorApp();ca.setIconImage(new ImageIcon("images/focus.png").getImage());ca.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);ca.setVisible(true);    }}

看的出来，写的很基础把，希望不要嫌弃哟。谢谢参考！生活愉快！

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