Create multi dimensional array using reflection - Java Reflection

Java examples for Reflection:Array

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Description

Create multi dimensional array using reflection

Demo Code

import java.lang.reflect.Array;
import static java.lang.System.out;

public class CreateMatrix {
    public static void main(String... args) {
        Object matrix = Array.newInstance(int.class, 2, 2);
        Object row0 = Array.get(matrix, 0);
        Object row1 = Array.get(matrix, 1);

        Array.setInt(row0, 0, 1);
        Array.setInt(row0, 1, 2);
        Array.setInt(row1, 0, 3);
        Array.setInt(row1, 1, 4);

        for (int i = 0; i < 2; i++)
            for (int j = 0; j < 2; j++)
                out.format("matrix[%d][%d] = %d%n", i, j,
                        ((int[][]) matrix)[i][j]);
    }//w  w  w  .j a  v  a  2 s .  c om
}

/*
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 *
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 * modification, are permitted provided that the following conditions
 * are met:
 *
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 *     notice, this list of conditions and the following disclaimer.
 *
 *   - Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *
 *   - Neither the name of Oracle or the names of its
 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

Result


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