[Mi:eclipse/workspace/rep#6] j03040% java List Keisan.java
File name:Keisan.java
 1:/*
 2: * day: 2004/01/04
 3: * @author j03040
 4: * @ST-ID  035740F
 5: */
 6:import java.awt.*;
 7:import java.awt.event.*;
 8:public class Keisan extends Frame implements ActionListener{
 9:     Label x0=new Label();
 10:    Label x1=new Label("=");
 11:    TextField[] t0=new TextField[]{new TextField(),
 12:    new TextField(),new TextField()};
 13:    Button[] b0=new Button[] {new Button("+"),
 14:                            new Button("-"),new Button("*"),
 15:                            new Button("/")};
 16:    public Keisan(){
 17:            setLayout(null);
 18:            for(int i=0;i<t0.length;i++){
 19:                    add(t0[i]);t0[i].setBounds(20+i*70,40,50,10);
 20:            }
 21:            add(x0);x0.setBounds(70,40,20,10);
 22:            add(x1);x1.setBounds(140,40,20,10);
 23:            for(int a=0;a<b0.length;a++){
 24:                    add(b0[a]);b0[a].setBounds(20+a*30,80,40,30);
 25:                    b0[a].addActionListener(this);
 26:            }
 27:    }
 28:    public void actionPerformed(ActionEvent evt) {
 29:            try {
 30:             int a=Integer.parseInt(t0[0].getText());
 31:             int b=Integer.parseInt(t0[1].getText());
 32:             if(evt.getSource()==b0[0]){ 
 33:                    x0.setText("+");
 34:                    t0[2].setText(Integer.toString(a+b));
 35:             }
 36:             else if(evt.getSource()==b0[1]){
 37:                    x0.setText("-");
 38:                    t0[2].setText(Integer.toString(a-b));
 39:             }
 40:             else if(evt.getSource()==b0[2]){
 41:                    x0.setText("*");
 42:                    t0[2].setText(Integer.toString(a*b));
 43:             }
 44:             else if(evt.getSource()==b0[3]){
 45:                    x0.setText("/");
 46:                    t0[2].setText(Integer.toString(a/b));
 47:             }
 48:            }catch(Exception ex){
 49:                    for(int a=0;a<t0.length;a++){
 50:                            t0[a].setText("");
 51:                    }
 52:            }
 53:    }
 54:    public static void main(String[] args) {
 55:            Frame aaa=new Keisan();
 56:            aaa.setSize(250,130);
 57:            aaa.setVisible(true);
 58:            aaa.setTitle("Keisanki");
 59:            aaa.addWindowListener(new WindowAdapter() {
 60:            public void windowClosing(WindowEvent evt) {
 61:                    System.exit(0);
 62:            }
 63:            }); 
 64:    }
 65:
 66:}