Skrive om til en applet?

[DArkwIng]

kan jeg skrive dette om til en applet?

 

 

import java.io.*;

 

public class Tekstles {

public static void main(String[] arguments) {

 

try {

FileReader txt = new FileReader("txt.txt");

BufferedReader buff = new BufferedReader(txt);

boolean eof = false;

while (!eof) {

String line = buff.readLine();

if (line == null)

eof = true;

else

System.out.println(line);

 

 

 

 

 

 

}

buff.close();

 

} catch (IOException e) {

System.out.println("Error - " + e.toString());

}

}

}

[buskmann]

Appleter har ikke tilgang til filsystemet.

 

Appleter uten GUI er omtrent meningsløst.

[DArkwIng]

kan en applet hente data fra en Sql database då?

[berzerker]

kan en applet hente data fra en Sql database då?

Den kan egentlig gjøre det meste så lenge den får lov fra policy filen, men generelt bør du ALDRI bruke applet som GUI med mindre du absolutt trenger det som applet.

 

Virker som du har misforstått dette med applets litt, det er ikke en grafikk som skal brukes. Hvis du vil lage en webside bruker du JSP/Servlets i stedet.

[DArkwIng]

slik løste jeg det

 

 

 

 

import java.awt.Graphics;

import java.awt.Font;

import java.util.Date;

import java.util.*;

import java.awt.*;

import java.awt.Graphics2D;

import java.awt.Polygon;

import java.awt.geom.*;

import java.io.*;

 

 

public class Rpm extends java.applet.Applet

 

 

implements Runnable {

Image hud;

java.awt.Choice myChoice;

int i, viser;

float verdi, verdi2, rpm;

Font theFont = new Font("TimesRoman",Font.BOLD,24);

Date theDate;

Thread runner;

 

public void init() {

myChoice = new java.awt.Choice();

add(myChoice);

readFile("txt.txt");

hud = getImage(getCodeBase(),"hud.jpg");

}

 

public void readFile(String f) {

try {

String anItem = "";

java.net.URL source =

new java.net.URL(getCodeBase(), f);

java.io.BufferedReader in =

new java.io.BufferedReader

(new java.io.InputStreamReader(source.openStream()));

while(null != (anItem = in.readLine()))

myChoice.add(anItem);

in.close();

}

catch(Exception e) {

e.printStackTrace();

}

}

 

public void start() {

if (runner == null) {

runner = new Thread(this);

runner.start();

}

}

 

public void stop() {

if (runner != null) {

runner = null;

}

}

 

public void run() {

 

Thread thisThread = Thread.currentThread();

while (runner == thisThread) {

repaint();

try {

Thread.sleep(100);

} catch (InterruptedException e) { }

}

}

 

 

 

 

public void paint(Graphics screen) {

Graphics2D screen2D = (Graphics2D)screen;

screen.drawImage(hud, 73, 74, this);

 

if (i<myChoice.getItemCount()){

verdi = Float.parseFloat(myChoice.getItem(i));

i++;

verdi2 = verdi/100;

rpm=Math.round(verdi2);

viser = (int)rpm; //tvinger Float variablen "rpm" til int

 

 

 

float xRpm[] = {125F, 120.61F, 116.54F,112.84F, 109.55F, 106.7F, 104.32F, 102.45F, 101.09F, 100.27F, 100F,

100F, 100.27F, 101.09F,102.45F,104.32F,106.7F,109.55F,112.84F,116.54F,120.61F,125F, 129.66F,134.55F,139.6F,144.77F, 150F, 150.0F, 155.77F, 160.04F, 165.45F, 170.34F, 175F, 179.39F, 183.46F, 187.16F, 190.45F, 193.3F, 195.68F, 197.55F, 198.91F, 199.73F, 200F,

199.73F, 198.91F,197.55F,195.68F,193.3F,190.45F,187.16F,183.46F,179.39F,175F,170.34F,165.45F,160.04F,155.77F,150.0F,

144.77F, 139.6F, 134.55F, 129.66F};

 

float yRpm[] = {193.3F, 190.45F, 187.16F, 183.46F, 179.39F, 175F, 170.34F, 165.45F, 160.4F, 155.23F,

150F, 144.77F, 139.6F, 134.55F, 129.66F, 125F, 120.61F, 116.54F, 112.84F, 109.55F, 106.7F, 104.32F, 102.45F, 101.09F, 100.27F, 100F,100F, 100F, 100.27F, 101.09F, 102.45F, 104.32F, 106.7F,109.55F,112.84F,116.54F,120.61F, 125F, 129.66F, 134.55F, 139.6F, 144.77F, 150F,

155.23F, 160.4F, 165.45F, 170.34F, 175F, 179.39F, 183.46F, 187.16F, 190.45F, 193.3F, 195.68F, 197.55F, 198.91F, 199.73F, 200F,

199.73F, 198.91F, 197.55F, 195.68F};

 

 

screen.drawString("rpm "+(rpm*100),150,50);

//screen.drawLine(xRpm,yRpm,150F,150F);

 

GeneralPath blyant = new GeneralPath();

blyant.moveTo(150,150);

blyant.lineTo(xRpm[viser],yRpm[viser]);

 

screen2D.setColor(Color.red);

screen2D.draw(blyant);

 

}

}

}