Java version of c# Array.Copy(Array sourceArray, int sourceIndex, Array destinationArray, int destinationIndex, int length)

Question

I'm trying to convert some C# code to Java and I came across a line that calls this method:

Array.Copy(
    frames[row],
    0,
    concatenated,
    row*frames[row].Length,
    frames[row].Length);

The signature of the C# method looks like this:

Array.Copy(
    Array sourceArray,
    int sourceIndex,
    Array destinationArray,
    int destinationIndex,
    int length)

I'm trying to find way to do the same in Java with no luck. How can I mimic the same behavior in Java?

I should probably mention that the line preceding this one is a loop: for (int row = 0; row < rows; row++) — adam0101
– adam0101, Commented May 15, 2012 at 2:57
You have trouble writing for(i=sourceIndex; i<dest+len;i++)... loop or trying to find some optimized code? — Alexei Levenkov
– Alexei Levenkov, Commented May 15, 2012 at 2:57

user1373996 · Accepted Answer · 2012-05-15 03:02:13Z

9

Did you try to System.arraycopy() ?

Example:

 char[] copyFrom = { 'd', 'e', 'c', 'a', 'f', 'f', 'e', 'i', 'n', 'a', 't', 'e', 'd' };
 char[] copyTo = new char[10];

 System.arraycopy(copyFrom, 1, copyTo, 2, 8);
 System.out.println(new String(copyTo));

The output will be:

  ecaffein

answered May 15, 2012 at 3:02

user1373996

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