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A = imread('lena.jpg');
A = double(A);
%1 red
%2 green
%3 blue
 
R = A(:, :, 1);
G = A(:, :, 2);
B = A(:, :, 3);
 
B = uint8(B);
G = uint8(G);
R = uint8(R);
 
imshow(R);
imshow(G);
imshow(B);

Main.java:1: error: class, interface, or enum expected
A = imread('lena.jpg');
^
Main.java:1: error: unclosed character literal
A = imread('lena.jpg');
           ^
Main.java:1: error: unclosed character literal
A = imread('lena.jpg');
                    ^
Main.java:2: error: class, interface, or enum expected
A = double(A);
^
Main.java:3: error: class, interface, or enum expected
%1 red
^
Main.java:8: error: class, interface, or enum expected
G = A(:, :, 2);
^
Main.java:9: error: class, interface, or enum expected
B = A(:, :, 3);
^
Main.java:11: error: class, interface, or enum expected
B = uint8(B);
^
Main.java:12: error: class, interface, or enum expected
G = uint8(G);
^
Main.java:13: error: class, interface, or enum expected
R = uint8(R);
^
Main.java:15: error: class, interface, or enum expected
imshow(R);
^
Main.java:16: error: class, interface, or enum expected
imshow(G);
^
Main.java:17: error: class, interface, or enum expected
imshow(B);
^
13 errors

Standard output is empty