MATLAB REAL-TIME WORKSHOP 7 - TARGET LANGUAGE COMPILER Manual do Utilizador descarregar pdf (Página 215)

100

101

Working with Java Arrays

5-45

java.lang.Double[][]:

[11] [12] [13] [14]

[21] [22] [23] [24]

[ 0] [ 0] [ 0] [ 0]

Creating a Copy of a Java Array

You can create an entirely new array from an existing Java array by indexing

into the array to describe a block of elements, (or subarray), and assigning this

subarray to a variable. The assignment copies the values in the original array

to the corresponding cells of the new array.

As with the example in section “Creating a New Array Reference” on page 5-44,

an original array is created and initialized. But, this time, a copy is made of the

array contents rather than copying the array reference. Changes made using

the reference to the new array do not affect the original.

origArray = javaArray('java.lang.Double', 3, 4);

for m = 1:3

for n = 1:4

origArray(m,n) = java.lang.Double((m * 10) + n);

end

origArray

origArray =

java.lang.Double[][]:

[11] [12] [13] [14]

[21] [22] [23] [24]

[31] [32] [33] [34]

% ----- Make a copy of the array contents -----

newArray = origArray(:,:);

newArray(3,:) = java.lang.Double(0);

origArray

origArray =

java.lang.Double[][]:

[11] [12] [13] [14]

[21] [22] [23] [24]

[31] [32] [33] [34]

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