昔作ったiアプリですね…ああ何もかも懐かしい

PacketCalc.java

import com.nttdocomo.ui.*;
import com.nttdocomo.util.*;
import java.lang.*;

public class PacketCalc extends IApplication {

	MainCanvas c;

    public void start() {
    	c = new MainCanvas(this);
        Display.setCurrent((Frame)c);
    }
    
    public void resume() {
    	c.tm.start();
    }

}

class MainCanvas extends Canvas implements TimerListener{

    String in = "", out = "";
    int mode = 0, pake = 0;
    public Timer tm;
    private PacketCalc par;
    
    final int PAKE_FOMA = 0;
    final int PAKE_HO 	= 1;
    final int PAKE_D2	= 2;
    final int MODE_PKT 	= 0;
    final int MODE_BYTE = 1;
    final int MODE_KB	= 2;
    final int MODE_MB	= 3;

    MainCanvas(PacketCalc pr) {
    	par = pr;
        
        setSoftLabel(SOFT_KEY_1, "END");
        setSoftLabel(SOFT_KEY_2, ".");
        setBackground(Graphics.getColorOfName(Graphics.WHITE));

        tm = new Timer();
        tm.setTime(100);
        tm.setRepeat(true);
        tm.setListener((TimerListener)this);
        tm.start();
        
    }

    public void paint(Graphics g) {
        g.lock();
        Font f = Font.getFont(Font.SIZE_SMALL);
        g.setFont(f);
        g.clearRect(0, 0, 240, 240);
        g.setColor(Graphics.getColorOfName(Graphics.BLACK));
        g.drawRect(14,38,130,30);
        g.drawString("通信料概算機",70,20);
        g.drawLine(50,25,190,25);
        g.drawString(in,20,60);
        g.drawLine(1,144,68,144);
        g.drawLine(167,144,239,144);
        g.drawLine(1,230,239,230);
        g.drawString("パケット単価",70,150);
        g.drawString("FOMA通信料     (0.21  円)",22,180);
        g.drawString("ﾊﾟｹﾎｰﾀﾞｲ ﾀﾞﾌﾞﾙ (0.084 円)",22,200);
        g.drawString("ﾊﾟｹﾎｰﾀﾞｲ ﾀﾞﾌﾞﾙ2(0.0525円)",22,220);
        switch (mode) {
        	case MODE_PKT:
            	g.drawString("ﾊﾟｹｯﾄ",172,61);
            	break;
            case MODE_BYTE:
            	g.drawString("ﾊﾞｲﾄ",175,61);
            	break;
            case MODE_KB:
            	g.drawString("KB",180,61);
                break;
            case MODE_MB:
            	g.drawString("MB",180,61);
                break;
        }
        g.drawRect(8,90,240,25);
        g.drawString(out,10,110);
        g.setColor(Graphics.getColorOfName(Graphics.BLUE));
        g.drawString("▲",0,180);
        g.drawString("▼",0,220);
        g.drawString("←",150,60);
        g.drawString("→",220,60);
        g.drawString("(単位)",169,82);
        switch (pake) {
        	case PAKE_FOMA:
            	g.drawRect(20,162,210,21);
            	break;
            case PAKE_HO:
            	g.drawRect(20,182,210,21);
            	break;
            case PAKE_D2:
            	g.drawRect(20,202,210,21);
                break;
        }
        g.unlock(true);
    }

    public void processEvent(int type, int param) {
        if (type == Display.KEY_RELEASED_EVENT) {
            if (param == Display.KEY_SOFT1 
            	|| param == Display.KEY_IAPP 
                || param == Display.KEY_CLEAR) {
                if (in.equals("") && out.equals(""))
                	par.terminate();
            	in = "";
                out = "";
            }
            
            //入力文字数は15桁以内とする
            if (in.length() < 15) {
            	if (param == Display.KEY_SOFT2) in += ".";
	            if (param == Display.KEY_1) in += "1";
	            if (param == Display.KEY_2) in += "2";
	            if (param == Display.KEY_3) in += "3";
	            if (param == Display.KEY_4) in += "4";
	            if (param == Display.KEY_5) in += "5";
	            if (param == Display.KEY_6) in += "6";
	            if (param == Display.KEY_7) in += "7";
	            if (param == Display.KEY_8) in += "8";
	            if (param == Display.KEY_9) in += "9";
	            if (param == Display.KEY_0) in += "0";
            }
            
            if (param == Display.KEY_UP) {
            	if (pake == 0) pake = 2;
            	else pake--;
            }
            if (param == Display.KEY_DOWN) {
            	if (pake == 2) pake = 0;
            	else pake++;
            }
            if (param == Display.KEY_LEFT) {
            	if (mode == 0) mode = 3;
                else mode--;
            }
            if (param == Display.KEY_RIGHT) {
            	if (mode == 3) mode = 0;
                else mode++;
            }
            
            if (param == Display.KEY_SELECT && !in.equals("") ) {
            	try {
	            	double dat = Double.parseDouble(in);
	                double mny = 0;
	                int work = mode;
	                while(work > 1) {
	                    dat = dat * 1024;
	                    work--;
	                }
	                if (work == 1) dat = dat / 128;
	                switch (pake) {
	                    case 0:
	                        mny = 0.21 * dat;
	                        break;
	                    case 1:
	                        mny = 0.084 * dat;
	                        break;
	                    case 2:
	                        mny = 0.0525 * dat;
	                        break;
	                }
	                out = ("→ " + String.valueOf(mny) + "円(税込)");
                }
                catch (NumberFormatException ex1) {
                	out = "Syntax Error";
                }
            }
            
            if (!in.equals("") || !out.equals("")) setSoftLabel(SOFT_KEY_1, "ｸﾘｱ");
            else setSoftLabel(SOFT_KEY_1, "END");
        }
    }

    public void timerExpired(Timer source) {
    	repaint();
    }
    
}