对象数组转换为List

import java.util.ArrayList; 
import java.util.Arrays; 
import java.util.List; 

/** 
* 对象数组转换为List 
* 
* @author leizhimin 2010-4-29 19:08:12 
*/ 
public  class TestArray { 
         public  static  void main(String[] args) { 
                String[] a1 = { "a",  "b",  "c"}; 
                String[] a2 = {}; 

                List s1 = array2List(a1); 
                List s2 = array2List(a2); 

                List s3 = array2List2(a1); 
                List s4 = array2List2(a2); 

                List s5 = array2List( null); 
                List s6 = array2List2( null); 


                System.out.println(s1.size()); 
                System.out.println(s2.size()); 
                System.out.println(s3.size()); 
                System.out.println(s4.size()); 
                System.out.println(s5.size()); 
                System.out.println(s6.size()); 
        } 

         /** 
         * 数组转换为List（不推荐使用） 
         * 
         * @param arr 数组 
         * @return List 
         */ 
         public  static List array2List(Object[] arr) { 
                List list =  new ArrayList(); 
                 if (arr ==  null)  return list; 
                 for ( int i = 0; i < arr.length; i++) { 
                        list.add(arr[i]); 
                } 
                 return list; 
        } 

         /** 
         * 数组转换为List（推荐使用） 
         * 
         * @param arr 数组 
         * @return List 
         */ 
         public  static List array2List2(Object[] arr) { 
                List list =  new ArrayList(); 
                 if (arr ==  null)  return list; 
                list = Arrays.asList(arr); 
                 return list; 
        } 
}

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