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    <p>Create the array and then initialize it in a for loop. <a href="http://download.oracle.com/javase/6/docs/api/java/util/Random.html#nextInt%28int%29" rel="nofollow">Random.nextInt(n)</a> gives you what you need.</p> <p>Here's a sample code with three different runs. </p> <pre><code>import java.util.*; class Init { public static void main( String ... args ) { Random random = new Random(); double[][] array = new double[10][10]; for( int i = 0 ; i &lt; array.length ; i++ ) { for ( int j = 0 ; j &lt; array[i].length ; j++ ) { array[i][j] = random.nextInt(101); } } for( double[] a : array ) { System.out.println( Arrays.toString( a )); } } } </code></pre> <p>Output:</p> <pre><code>C:\Users\oreyes\langs\java&gt;java Init [2.0, 92.0, 31.0, 98.0, 3.0, 5.0, 57.0, 41.0, 29.0, 89.0] [54.0, 57.0, 68.0, 92.0, 11.0, 20.0, 14.0, 58.0, 84.0, 23.0] [48.0, 14.0, 9.0, 33.0, 9.0, 27.0, 74.0, 34.0, 85.0, 91.0] [51.0, 87.0, 2.0, 96.0, 52.0, 81.0, 91.0, 95.0, 19.0, 56.0] [15.0, 90.0, 9.0, 85.0, 51.0, 23.0, 35.0, 21.0, 78.0, 14.0] [23.0, 20.0, 57.0, 94.0, 69.0, 99.0, 90.0, 78.0, 61.0, 38.0] [35.0, 61.0, 81.0, 72.0, 3.0, 93.0, 20.0, 96.0, 9.0, 35.0] [90.0, 100.0, 98.0, 14.0, 95.0, 75.0, 96.0, 8.0, 87.0, 25.0] [14.0, 41.0, 27.0, 57.0, 32.0, 37.0, 69.0, 61.0, 5.0, 42.0] [57.0, 0.0, 85.0, 28.0, 78.0, 47.0, 89.0, 54.0, 50.0, 59.0] C:\Users\oreyes\langs\java&gt;java Init [3.0, 27.0, 37.0, 31.0, 52.0, 19.0, 63.0, 81.0, 88.0, 12.0] [80.0, 27.0, 7.0, 55.0, 21.0, 100.0, 73.0, 62.0, 9.0, 91.0] [85.0, 50.0, 66.0, 27.0, 63.0, 44.0, 0.0, 37.0, 93.0, 82.0] [73.0, 57.0, 4.0, 80.0, 5.0, 51.0, 63.0, 13.0, 97.0, 11.0] [87.0, 62.0, 20.0, 14.0, 44.0, 77.0, 71.0, 42.0, 27.0, 82.0] [37.0, 32.0, 96.0, 95.0, 45.0, 8.0, 11.0, 38.0, 61.0, 6.0] [34.0, 67.0, 84.0, 50.0, 38.0, 64.0, 50.0, 51.0, 50.0, 47.0] [79.0, 31.0, 54.0, 37.0, 27.0, 54.0, 57.0, 30.0, 77.0, 36.0] [74.0, 20.0, 98.0, 37.0, 8.0, 17.0, 18.0, 1.0, 29.0, 56.0] [21.0, 4.0, 33.0, 87.0, 4.0, 76.0, 65.0, 62.0, 76.0, 96.0] C:\Users\oreyes\langs\java&gt;java Init [17.0, 3.0, 78.0, 32.0, 99.0, 76.0, 94.0, 93.0, 31.0, 55.0] [4.0, 25.0, 63.0, 68.0, 58.0, 39.0, 7.0, 55.0, 73.0, 86.0] [96.0, 89.0, 6.0, 100.0, 20.0, 58.0, 100.0, 91.0, 35.0, 46.0] [3.0, 16.0, 88.0, 82.0, 85.0, 35.0, 0.0, 1.0, 91.0, 78.0] [3.0, 33.0, 77.0, 10.0, 69.0, 60.0, 75.0, 58.0, 8.0, 31.0] [72.0, 36.0, 2.0, 19.0, 39.0, 15.0, 5.0, 74.0, 16.0, 28.0] [48.0, 71.0, 38.0, 17.0, 37.0, 34.0, 80.0, 98.0, 16.0, 42.0] [66.0, 74.0, 96.0, 80.0, 75.0, 7.0, 14.0, 46.0, 63.0, 56.0] [4.0, 15.0, 8.0, 93.0, 58.0, 21.0, 81.0, 100.0, 2.0, 44.0] [20.0, 71.0, 41.0, 43.0, 83.0, 7.0, 60.0, 28.0, 99.0, 42.0] </code></pre>
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    1. COThank you so much for this wonderful answer; unfortunately, I encounter an error when attempting this. The error flags up on the following line: array[i][j] = random.nextInt(101); It highlights/underlines 'nextInt' and displays the following message: "The method nextInt(int) is undefined for the type Integer". What could the problem be here? Thank you, OscarRyz.
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    2. COYou've defined random as `Integer` , declare it as `Random` as in : `Random random = new Random()`
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    3. COI have tried that and still no luck unfortunately...could there be an error elsewhere in my project that eclipse has not detected?
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