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);
}
//-----------------------------------------------------------------------------
@Override
public 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");
}
else
ioput.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！