动态调整数组的长度

package com.jdk7.chapter4;

public class AdjustArrayLength {
    private static int ADD_LENGTH = 10;
    public static Integer[] addArrayLength(Integer[] src){
        return addArrayLength(src,ADD_LENGTH);
    }
    
    public static Integer[] addArrayLength(Integer[] src, int length){
        if(src==null){
            return null;
        }
        Integer[] dest = new Integer[src.length+length];
        System.arraycopy(src, 0, dest, 0, src.length);
        return dest;
    }
    
    public static void printArray(Integer[] obj){
        for(int i=0;i<obj.length;i++){
            System.out.print(obj[i].toString()+" ");
        }
        System.out.println();
    }
    
    public static void main(String[] args) {
        Integer[] array = new Integer[10];
        for(int i=0;i<10;i++){
            array[i] = Integer.valueOf(i);
//            array[i] = new Integer(i);
        }
        
        Integer[] initArray = AdjustArrayLength.addArrayLength(array);
//        Integer[] initArray = AdjustArrayLength.addArrayLength(array, 5);
        for(int i=10;i<initArray.length;i++){
            initArray[i] = Integer.valueOf(i);
        }
        AdjustArrayLength.printArray(initArray);
    }
}

执行结果：
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