JAVA中对象数组和基本类型数组的互换

JAVA中对象数组和基本类型数组的互换以及数组和MAP的转换:
以下例子是:
1.0克隆和反转对象数组;
2.0在数组中搜索特定项;
3.0由多维数组生成;
  呵呵 这些可能在项目经常用到.我只是在我项目中碰到的问题做了一下电子笔记而已.

package JakartaCommonsCookbook;

import java.util.Map;

import org.apache.commons.lang.ArrayUtils;


public class UseArrayUtils {

   
     public static void main(String[] args) {
         cloneArray();
         ArrayUtilsContains();
         weightArrayConverToMap();

     }

     //001克隆和反转对象数组
     public static void cloneArray(){
         int[] array = {1, 3, 2, 3, 5, 6};
         int[] reversed = ArrayUtils.clone(array);
         ArrayUtils.reverse(reversed);
         System.out.println("----------cloneArray- and reverse---------- ");
         System.out.println("Original is : "+ArrayUtils.toString(array));
         System.out.println("reversed is : "+ArrayUtils.toString(reversed));

         //primitiveArray to objectArray
         long[] primitiveArray = new long[]{12,100,2992,3233};
         Long[] objectArray = ArrayUtils.toObject(primitiveArray);
         System.out.println("objectArray is : "+ArrayUtils.toString(objectArray));
     }

   
     public static void ArrayUtilsContains(){
         String[] stringArray = {"red","green","blue","brown", "yellow", "red"};
         boolean contiansBlue = ArrayUtils.contains(stringArray, "blue");
         int indexOfRed = ArrayUtils.indexOf(stringArray, "red");
         int lastIndexOfRed = ArrayUtils.lastIndexOf(stringArray, "red");
         System.out.println("----------ArrayUtilsContains----------- ");
         System.out.println("Array contains 'blue' is  "+contiansBlue);
         System.out.println("Index of red  is : "+indexOfRed);
         System.out.println("Last Index of red  is : "+lastIndexOfRed);
     }

   
     public static void weightArrayConverToMap(){
         Object[] weightArray = new Object[][]{
         {"H",new Double(1.007)},
         {"He",new Double(4.007)},
         {"Li",new Double(6.007)},
         {"B",new Double(5.007)},
         {"Be",new Double(2.007)},
         {"C",new Double(11.007)},
         {"N",new Double(12.007)},
         {"O",new Double(13.007)}
         };

         // create Map mapping colors
         Map map = ArrayUtils.toMap(weightArray);
         Double hydorgenWeight = (Double) map.get("H");
         System.out.println("----------weightArrayConverToMap-----------");
         System.out.println(hydorgenWeight);
         System.out.println((Double) map.get("He"));
         System.out.println((Double) map.get("O"));
     }


}
执行结果为:
----------cloneArray- and reverse----------
Original is : {1,3,2,3,5,6}
reversed is : {6,5,3,2,3,1}
objectArray is : {12,100,2992,3233}
----------ArrayUtilsContains-----------
Array contains 'blue' is  true
Index of red  is : 0
Last Index of red  is : 5
----------weightArrayConverToMap-----------
1.007
4.007
13.007