Make copy Of an Array - Java Collection Framework

Java examples for Collection Framework:Array Element

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Description

Make copy Of an Array

Demo Code

/**//ww  w  .java2 s.  com
 * 
 * Copyright 2008 - 2011
 * 
 * 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.
 * 
 * @project loonframework
 * @author chenpeng
 * @email?ceponline@yahoo.com.cn
 * @version 0.1.1
 */
//package com.java2s;
import java.lang.reflect.Array;

public class Main {
    public static void main(String[] argv) {
        Object src = "java2s.com";
        System.out.println(copyOf(src));
    }

    public static Object copyOf(Object src) {
        int srcLength = Array.getLength(src);
        Class<?> srcComponentType = src.getClass().getComponentType();
        Object dest = Array.newInstance(srcComponentType, srcLength);
        if (srcComponentType.isArray()) {
            for (int i = 0; i < Array.getLength(src); i++) {
                Array.set(dest, i, copyOf(Array.get(src, i)));
            }
        } else {
            System.arraycopy(src, 0, dest, 0, srcLength);
        }
        return dest;
    }

    public static int[][] copyOf(int[][] obj) {
        int size = obj.length;
        int[][] copy = new int[size][];
        for (int i = 0; i < size; i++) {
            int len = obj[i].length;
            int[] res = new int[len];
            System.arraycopy(obj[i], 0, res, 0, len);
            copy[i] = res;
        }
        return copy;
    }

    public static String[] copyOf(String[] obj) {
        return copyOf(obj, obj.length);
    }

    public static String[] copyOf(String[] obj, int newSize) {
        String tempArr[] = new String[newSize];
        System.arraycopy(obj, 0, tempArr, 0, Math.min(obj.length, newSize));
        return tempArr;
    }

    public static int[] copyOf(int[] obj) {
        return copyOf(obj, obj.length);
    }

    public static int[] copyOf(int[] obj, int newSize) {
        int tempArr[] = new int[newSize];
        System.arraycopy(obj, 0, tempArr, 0, Math.min(obj.length, newSize));
        return tempArr;
    }

    public static double[] copyOf(double[] obj) {
        return copyOf(obj, obj.length);
    }

    public static double[] copyOf(double[] obj, int newSize) {
        double tempArr[] = new double[newSize];
        System.arraycopy(obj, 0, tempArr, 0, Math.min(obj.length, newSize));
        return tempArr;
    }

    public static float[] copyOf(float[] obj) {
        return copyOf(obj, obj.length);
    }

    public static float[] copyOf(float[] obj, int newSize) {
        float tempArr[] = new float[newSize];
        System.arraycopy(obj, 0, tempArr, 0, Math.min(obj.length, newSize));
        return tempArr;
    }

    public static byte[] copyOf(byte[] obj) {
        return copyOf(obj, obj.length);
    }

    public static byte[] copyOf(byte[] obj, int newSize) {
        byte tempArr[] = new byte[newSize];
        System.arraycopy(obj, 0, tempArr, 0, Math.min(obj.length, newSize));
        return tempArr;
    }

    public static char[] copyOf(char[] obj) {
        return copyOf(obj, obj.length);
    }

    public static char[] copyOf(char[] obj, int newSize) {
        char tempArr[] = new char[newSize];
        System.arraycopy(obj, 0, tempArr, 0, Math.min(obj.length, newSize));
        return tempArr;
    }

    public static long[] copyOf(long[] obj) {
        return copyOf(obj, obj.length);
    }

    public static long[] copyOf(long[] obj, int newSize) {
        long tempArr[] = new long[newSize];
        System.arraycopy(obj, 0, tempArr, 0, Math.min(obj.length, newSize));
        return tempArr;
    }

    public static boolean[] copyOf(boolean[] obj) {
        return copyOf(obj, obj.length);
    }

    public static boolean[] copyOf(boolean[] obj, int newSize) {
        boolean tempArr[] = new boolean[newSize];
        System.arraycopy(obj, 0, tempArr, 0, Math.min(obj.length, newSize));
        return tempArr;
    }
}

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