学步园

这个是2000年初学Java的时候写的了

那时候写个计算机来练习........

import java.applet.*;<br /> import java.awt.*;<br /> import java.awt.event.*;<br /> public class cal extends Applet implements ActionListener<br /> {<br /> /////////////定義資料/////////////////////////////<br /> long iFirst=0,iNum=0;<br /> int iCal=0;<br /> Button bn1=new Button("1"),<br /> bn2=new Button("2"),<br /> bn3=new Button("3"),<br /> bn4=new Button("4"),<br /> bn5=new Button("5"),<br /> bn6=new Button("6"),<br /> bn7=new Button("7"),<br /> bn8=new Button("8"),<br /> bn9=new Button("9"),<br /> bn10=new Button("0"),<br /> bnadd=new Button("+"),<br /> bnsub=new Button("-"),<br /> bnmul=new Button("*"),<br /> bneli=new Button("/"),<br /> bnequ=new Button("="),<br /> bncls=new Button("C");<br /> Label lb_show=new Label("***計算機***",Label.RIGHT);<br /> Panel p1=new Panel(),<br /> p2=new Panel(),<br /> p3=new Panel(),<br /> p4=new Panel(),<br /> p5=new Panel();<br /> /////////////////載入//////////////////////////////<br /> public void init()<br /> {<br /> p1.setLayout(new FlowLayout(FlowLayout.CENTER,0,5));<br /> p1.add(lb_show);<br /> p2.setLayout(new FlowLayout(FlowLayout.CENTER,3,5));<br /> p2.add(bn7);<br /> p2.add(bn8);<br /> p2.add(bn9);<br /> p2.add(bneli);<br /> p3.setLayout(new FlowLayout(FlowLayout.CENTER,3,5));<br /> p3.add(bn4);<br /> p3.add(bn5);<br /> p3.add(bn6);<br /> p3.add(bnmul);<br /> p4.setLayout(new FlowLayout(FlowLayout.CENTER,3,5));<br /> p4.add(bn1);<br /> p4.add(bn2);<br /> p4.add(bn3);<br /> p4.add(bnsub);<br /> p5.setLayout(new FlowLayout(FlowLayout.CENTER,3,5));<br /> p5.add(bn10);<br /> p5.add(bncls);<br /> p5.add(bnequ);<br /> p5.add(bnadd);<br /> add(p1);<br /> add(p2);<br /> add(p3);<br /> add(p4);<br /> add(p5);<br /> bn1.addActionListener(this);<br /> bn2.addActionListener(this);<br /> bn3.addActionListener(this);<br /> bn4.addActionListener(this);<br /> bn5.addActionListener(this);<br /> bn6.addActionListener(this);<br /> bn7.addActionListener(this);<br /> bn8.addActionListener(this);<br /> bn9.addActionListener(this);<br /> bn10.addActionListener(this);<br /> bnadd.addActionListener(this);<br /> bnsub.addActionListener(this);<br /> bnmul.addActionListener(this);<br /> bneli.addActionListener(this);<br /> bnequ.addActionListener(this);<br /> bncls.addActionListener(this);<br /> }<br /> //////////////按鈕事件/////////////////////////////<br /> public void actionPerformed(ActionEvent e)<br /> {<br /> if(e.getSource()==bncls)<br /> {<br /> iFirst=0;<br /> iNum=0;<br /> iCal=0;<br /> lb_show.setText("0");<br /> }<br /> if(e.getSource()==bn1)<br /> {<br /> iNum=iNum*10+1;<br /> lb_show.setText(String.valueOf(iNum));<br /> }<br /> if(e.getSource()==bn2)<br /> {<br /> iNum=iNum*10+2;<br /> lb_show.setText(String.valueOf(iNum));<br /> }<br /> if(e.getSource()==bn3)<br /> {<br /> iNum=iNum*10+3;<br /> lb_show.setText(String.valueOf(iNum));<br /> }<br /> if(e.getSource()==bn4)<br /> {<br /> iNum=iNum*10+4;<br /> lb_show.setText(String.valueOf(iNum));<br /> }<br /> if(e.getSource()==bn5)<br /> {<br /> iNum=iNum*10+5;<br /> lb_show.setText(String.valueOf(iNum));<br /> }<br /> if(e.getSource()==bn6)<br /> {<br /> iNum=iNum*10+6;<br /> lb_show.setText(String.valueOf(iNum));<br /> }<br /> if(e.getSource()==bn7)<br /> {<br /> iNum=iNum*10+7;<br /> lb_show.setText(String.valueOf(iNum));<br /> }<br /> if(e.getSource()==bn8)<br /> {<br /> iNum=iNum*10+8;<br /> lb_show.setText(String.valueOf(iNum));<br /> }<br /> if(e.getSource()==bn9)<br /> {<br /> iNum=iNum*10+9;<br /> lb_show.setText(String.valueOf(iNum));<br /> }<br /> if(e.getSource()==bn10)<br /> {<br /> iNum=iNum*10+0;<br /> lb_show.setText(String.valueOf(iNum));<br /> }<br /> if(e.getSource()==bnadd)<br /> {<br /> iFirst=iNum;<br /> iNum=0;<br /> iCal=1;<br /> }<br /> if(e.getSource()==bnsub)<br /> {<br /> iFirst=iNum;<br /> iNum=0;<br /> iCal=2;<br /> }<br /> if(e.getSource()==bnmul)<br /> {<br /> iFirst=iNum;<br /> iNum=0;<br /> iCal=3;<br /> }<br /> if(e.getSource()==bneli)<br /> {<br /> iFirst=iNum;<br /> iNum=0;<br /> iCal=4;<br /> }<br /> if(e.getSource()==bnequ)<br /> {<br /> switch(iCal)<br /> {<br /> case 1:<br /> lb_show.setText(String.valueOf(iFirst+iNum));<br /> break;<br /> case 2:<br /> lb_show.setText(String.valueOf(iFirst-iNum));<br /> break;<br /> case 3:<br /> lb_show.setText(String.valueOf(iFirst*iNum));<br /> break;<br /> case 4:<br /> lb_show.setText(String.valueOf(iFirst/iNum));<br /> break;<br /> }<br /> iFirst=0;<br /> iNum=0;<br /> iCal=0;<br /> }<br /> }<br /> }