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copied!<p>Cast product to <code>double</code> value, i.e.: <code>int svar1 = (int)(dollar * valuta);</code>, but then you lose fraction part. Better approach is to declare <code>svar1</code> as <code>double</code>: <code>double svar1 = dollar * valuta</code>. Then, when you open message dialog, you need to properly construct message string. So, if you want to concatenate different factors into one string, you need to use <code>+</code> operator (and you have to make sure, that at least one of those factors is actually a string). So you need:</p> <blockquote> <p><code>showMessageDialog(null, dollar + " * " + valuta + " = " + svar1 + "\n");</code></p> </blockquote> <p>But if you want to have more control over format, you should consider using <code>format</code> method of <code>String</code> class (since 1.5; <a href="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/String.html#format%28java.lang.String,%20java.lang.Object...%29" rel="nofollow">see javadoc for String.format explanation</a>). Eventually you can use this:</p> <blockquote> <p><code>showMessageDialog(null, String.format("%0.2f * %0.2f = %0.2f\n", dollar, valuta, svar1));</code></p> </blockquote> <hr> <p>Well, you actually ask for something else now. Okay, see this (with an example of use):</p> <pre><code>private static final int[] PAYMENT_UNITS = { 1000, 500, 200, 100, 50, 20, 10, 5, 1 }; public static void main(final String[] args) { printCashOut(split(2004307)); } private static final void printCashOut(final int[] cacheOut) { int total = 0; for (int i = 0; i < PAYMENT_UNITS.length; i++) { final int p = cacheOut[i] * PAYMENT_UNITS[i]; System.out.printf("%4d x %4d = %8d\n", cacheOut[i], PAYMENT_UNITS[i], p ); total += p; } System.out.printf(" TOTAL: %8d\n", total); } private static final int[] split(final int amount) { if (amount < 0) { return null; } final int[] cashOut = new int[PAYMENT_UNITS.length]; int rest = amount; for (int i = 0; i < PAYMENT_UNITS.length; i++) { cashOut[i] = rest / PAYMENT_UNITS[i]; rest -= cashOut[i] * PAYMENT_UNITS[i]; } return cashOut; } </code></pre>

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