Copies all rows and columns between two double arrays - Java java.lang

Java examples for java.lang:Math Array Function

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Description

Copies all rows and columns between two double arrays

Demo Code

/*******************************************************************************
 * Copyright 2013 Karlsruhe Institute of Technology. This Work has been partially supported by the EIT ICT Labs funded research project Towards a Mobile Cloud (activity CLD 12206).
 * //from   w ww  .j a v a  2  s. c om
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 ******************************************************************************/
//package com.java2s;

public class Main {
    /**
     * Copies all rows and columns between two double arrays
     * 
     * @param src
     * @param dest
     */
    public static void arrayCopy(double[][] src, double[][] dest) {
        for (int r = 0; r < src.length; r++) {
            System.arraycopy(src[r], 0, dest[r], 0, src[r].length);
        }
    }

    /**
     * Copies all rows and columns between two double arrays
     * 
     * @param src
     * @param dest
     */
    public static double[][] arrayCopy(double[][] src) {
        double[][] dest = new double[src.length][];
        for (int r = 0; r < src.length; r++) {
            dest[r] = new double[src[r].length];
            System.arraycopy(src[r], 0, dest[r], 0, src[r].length);
        }
        return dest;
    }

    /**
     * Copies the required rows and columns between two 
     * double arrays
     * 
     * @param src
     * @param srcStartRow
     * @param srcStartCol
     * @param dest
     * @param destStartRow
     * @param destStartCol
     * @param rows
     * @param cols
     */
    public static void arrayCopy(double[][] src, int srcStartRow,
            int srcStartCol, double[][] dest, int destStartRow,
            int destStartCol, int rows, int cols) {

        for (int r = 0; r < rows; r++) {
            System.arraycopy(src[srcStartRow + r], srcStartCol,
                    dest[destStartRow + r], destStartCol, cols);
        }
    }

    /**
     * Copies all rows and columns between two int arrays
     * 
     * @param src
     * @param dest
     */
    public static void arrayCopy(int[][] src, int[][] dest) {
        for (int r = 0; r < src.length; r++) {
            System.arraycopy(src[r], 0, dest[r], 0, src[r].length);
        }
    }

    /**
     * Copies the required rows and columns between two 
     * double arrays
     * 
     * @param src
     * @param srcStartRow
     * @param srcStartCol
     * @param dest
     * @param destStartRow
     * @param destStartCol
     * @param rows
     * @param cols
     */
    public static void arrayCopy(int[][] src, int srcStartRow,
            int srcStartCol, int[][] dest, int destStartRow,
            int destStartCol, int rows, int cols) {

        for (int r = 0; r < rows; r++) {
            System.arraycopy(src[srcStartRow + r], srcStartCol,
                    dest[destStartRow + r], destStartCol, cols);
        }
    }
}

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