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  1. PO
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    <p>Here is an attempt at what I <strong>think</strong> you want. I've left the results in String form both to preserve leading zeros in the fraction part, and to avoid overflow. If you want to do arithmetic, rather than display, I recommend converting the String results to BigInteger, which will not overflow.</p> <pre><code>import java.math.BigDecimal; public class Test{ public static void main(String[] args){ double num1 = 122.007094; double num2 = 1236758511.98746514; testIt(num1); testIt(num2); testIt(1e7); testIt(0.1); testIt(0.12345678901234); } public static void testIt(double in) { String[] result = doubleSplit(in); System.out.println("num="+in+" whole="+result[0]+" fraction="+result[1]); } /** * Split the decimal representation of a double at where the decimal point * would be. The decimal representation is rounded as for Double.toString(). * @param in The double whose decimal representation is to be split. * @return A two element String[]. The first element is the part * before where the decimal point would be. The second element is the part * after where the decimal point would be. Each String is non-empty, with * "0" for the second element for whole numbers. */ public static String[] doubleSplit(double in) { /* Use BigDecimal to take advantage of its toPlainString. The * initial Double.toString uses its rounding to limit the * number of digits in the result. */ BigDecimal bd = new BigDecimal(Double.toString(in)); String [] rawSplit = bd.toPlainString().split("\\."); if(rawSplit.length &gt; 1){ return rawSplit; } else { return new String[]{rawSplit[0], "0"}; } } } </code></pre> <p>The output:</p> <pre><code>num=122.007094 whole=122 fraction=007094 num=1.2367585119874651E9 whole=1236758511 fraction=9874651 num=1.0E7 whole=10000000 fraction=0 num=0.1 whole=0 fraction=1 num=0.12345678901234 whole=0 fraction=12345678901234 </code></pre>
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    1. POSeparate double number larger than 10 digits in Java
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    1. USPatricia Shanahan
    1. USPatricia Shanahan
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      1. VTUpMod
    1. COThank you for your code. It is working properly upto 18 digits.
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      1. USOnePunchMan
 

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