java 汇率计算源代码ZZ 分类： Android开发 2014-05-30 10:56 65人阅读 评论(0) 收藏

import java.applet.Applet;
import java.awt.BorderLayout;
import java.awt.Frame;
import java.awt.Panel;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowEvent;
import java.awt.event.WindowListener;

import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JTextField;

public class ExchangeRate extends Applet implements ActionListener
{
private JFrame frame=new JFrame("汇率转换");
private JTextField text1=new JTextField();
private JTextField text2=new JTextField();
private String s[]={"美元USD ","人民币CNY","日元 JPY",
"欧元EUR","韩元KPW","加拿大元CAD","澳元AUD","英镑GBP","台币TWD","新西兰元NZD"};
private float rate[]={1,(float)6.8269,(float)89.1821992,(float)0.684134911,(float)1162.7907 ,
(float)1.06079974 ,(float)1.09793588 ,(float) 0.615763547 ,(float)32.1646832,(float)1.38159713};
private JComboBox cb=null;
private JComboBox cb1=null;
private double sum;//兑换后的金额

JLabel num=new JLabel("兑换金额");
JLabel money=new JLabel ("由 ");
JLabel bmoney=new JLabel("兑换至 ");
JLabel bnum=new JLabel("兑换后的金额为");
Panel p1;
Panel p2;
Panel p3;
Panel p4;
Panel p5;
JButton button;

public void init()
{
cb=new JComboBox(s);
cb1=new JComboBox(s);
text1 = new JTextField(15);
text2= new JTextField(10) ;
p1=new Panel();
p2=new Panel();
p3=new Panel();
p4=new Panel();
p5=new Panel();
p1.add(num,BorderLayout.WEST);
p1.add(text1,BorderLayout.EAST);
p2.add(money,BorderLayout.WEST);
p2.add(cb,BorderLayout.EAST);
p3.add(bmoney,BorderLayout.WEST);
p3.add(cb1,BorderLayout.EAST);
add(p1,BorderLayout.NORTH);
add(p2,BorderLayout.CENTER);
add(p3,BorderLayout.SOUTH);
button=new JButton("兑换");
p4.add(button,BorderLayout.WEST);
add(p4);
p5.add(bnum,BorderLayout.WEST);
p5.add(text2,BorderLayout.EAST);
add(p5);
//cb.addActionListener(this);
//cb1.addActionListener(this);
button.addActionListener(this);

}

public void actionPerformed(ActionEvent e) {

JButton button1=(JButton) e.getSource();
java.text.DecimalFormat df=new java.text.DecimalFormat("#.000000");
String text=text1.getText();
String sum1;
int cbx = cb.getSelectedIndex();//记录下标
int cb1x=cb1.getSelectedIndex();
if(button1==button)
{
sum=Float.parseFloat(text);

if(sum>0)
{

sum1=df.format((double)rate[cb1x]/(double)rate[cbx]*sum);
text2.setText(sum1);
}
else
text2.setText("你输入的金额错误！");
}

}
public static void main(String[] args) {
ExchangeRate er = new ExchangeRate();
Frame f = new Frame();
f.add(er);
f.setSize(500, 500);
er.init();
f.addWindowListener(new WindowListener(){
public void windowActivated(WindowEvent e) {}

public void windowClosed(WindowEvent e) {}

public void windowClosing(WindowEvent e) {
e.getWindow().dispose();
}

public void windowDeactivated(WindowEvent e) { }

public void windowDeiconified(WindowEvent e) { }

public void windowIconified(WindowEvent e) { }

public void windowOpened(WindowEvent e) { } 

});
f.show();
}
}

版权声明：本文为博主原创文章，未经博主允许不得转载。