import javax.swing.*;

public class hex2dez extends JApplet

{

public void init()

{

String aString = "0";

String newString = "";

double an = 0.0;

aString = JOptionPane.showInputDialog("Hex Zahl eingeben:");

for(int i=0; i < aString.length(); i++)

{

if (aString.charAt(i) >= '0' && aString.charAt(i) <= '9')

an += (int) (aString.charAt(i) - '0') * Math.pow(16,((double) (aString.length()-1)-i)) ;

if (aString.charAt(i) >= 'a' && aString.charAt(i) <= 'f')

an += (int) (10 +(aString.charAt(i) - 'a')) * Math.pow(16,((double) (aString.length()-1)-i)) ;

if (aString.charAt(i) >= 'A' && aString.charAt(i) <= 'F')

an += (int) (10 +(aString.charAt(i) - 'A')) * Math.pow(16,((double) (aString.length()-1)-i)) ;

}

newString += an;

JOptionPane.showMessageDialog(null, newString, "Dez. Wert",JOptionPane.INFORMATION_MESSAGE );

}

}