Arrays merging in Java
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int[] firstNumbers = { 2, 3, 5 };
int[] secondNumbers = { 7, 11, 13 };
int[] allNumbers = new int[firstNumbers.length + secondNumbers.length];
System.arraycopy(firstNumbers, 0, allNumbers, 0, firstNumbers.length);
System.arraycopy(secondNumbers, 0, allNumbers, firstNumbers.length, secondNumbers.length);
//allNumbers is { 2, 3, 5, 7, 11, 13 }
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