java数组和ArrayList用法

import java.util.*;public class ArrayDemo {  public static void main(String arg[]) {          String[] aArray = {"a", "b", "c"};    String[] bArray = new String[]{"d", "e", "f"};    //合并两个数组    String[] cArray = new String[aArray.length + bArray.length ];        System.arraycopy(aArray, 0, cArray, 0, aArray.length);    System.arraycopy(bArray, 0, cArray, aArray.length, bArray.length);            //数组反向排序    Arrays.sort(cArray, Collections.reverseOrder());    //数组正向排序    Arrays.sort(cArray);        //冒泡排序    int[] eArray = {3, 1, 5, 8, 2, 4, 6, 9, 7, 10};     int tmp = 0;     for(int i=0; i< eArray.length;i++){       for(int j=i+1;j<eArray.length;j++){          if(eArray[i] > eArray[j]){              tmp = eArray[i];              eArray[i] = eArray[j];              eArray[j] = tmp;          }       }    }    for (int i : eArray) {         System.out.println(i);     }      //数组转换为数组列表    ArrayList<String> cList = new ArrayList<String>(Arrays.asList(cArray));    //添加元素    cList.add("f");    //设置索引0处的值    cList.set(0, "a0");      // 移除索引1处的值    cList.remove(1);     for (int i=0; i<cList.size(); i++){             System.out.println(cList.get(i));           } //结果：a0 c d e f f        //是否包含指定元素     boolean b = cList.contains("a0");    System.out.println(b); //结果：true    //从前往后查询，反回第一个符合条件的位置    int a1 = cList.indexOf("f");    System.out.println(a1);  //结果：4    //从后往前查询，反回第一个符合条件的位置    int a2 = cList.lastIndexOf("f");    System.out.println(a2);  //结果：5       //数组列表转换为数组        String[] dArray = new String[cList.size()];    cList.toArray(dArray);    }}