java Programming Glossary: matrix.length
copy a 2d array in java http://stackoverflow.com/questions/1686425/copy-a-2d-array-in-java  having some troubles for example int myInt for int i 0 i matrix.length i for int j 0 j matrix i .length j  myInt i j matrix i j  do.. . Here is how to use clone for 2D case int myInt new int matrix.length for int i 0 i matrix.length i myInt i matrix i .clone For System.arraycopy.. for 2D case int myInt new int matrix.length for int i 0 i matrix.length i myInt i matrix i .clone For System.arraycopy you use int myInt.. 
 Programming Contest Question: Counting Polyominos http://stackoverflow.com/questions/4650762/programming-contest-question-counting-polyominos  public boolean copy boolean matrix  boolean b new boolean matrix.length matrix 0 .length for int i 0 i matrix.length i  System.arraycopy.. b new boolean matrix.length matrix 0 .length for int i 0 i matrix.length i  System.arraycopy matrix i 0 b 0 matrix i .length  return.. matrix  int l 0 t 0 r 0 b 0 Left left for int x 0 x matrix.length x  for int y 0 y matrix x .length y   if matrix x y   break.. 
 
 
     
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