三种字符数组合并的方法

public  static  String[] getOneArray() {
  String[] a = {  "0" ,  "1" ,  "2"  };
  String[] b = {  "0" ,  "1" ,  "2"  };
  String[] c =  new  String[a.length + b.length];
  for  ( int  j =  0 ; j < a.length; ++j) {
   c[j] = a[j];
  }
  for  ( int  j =  0 ; j < b.length; ++j) {
   c[a.length + j] = b[j];
  }
  return  c;
 }


 public  static  Object[] getTwoArray() {
  String[] a = {  "0" ,  "1" ,  "2"  };
  String[] b = {  "0" ,  "1" ,  "2"  };
  List aL = Arrays.asList(a);
  List bL = Arrays.asList(b);
  List resultList =  new  ArrayList();
  resultList.addAll(aL);
  resultList.addAll(bL);
  Object[] result = resultList.toArray();
  return  result;
 }


 public  static  String[] getThreeArray() {
  String[] a = {  "0" ,  "1" ,  "2" ,  "3"  };
  String[] b = {  "4" ,  "5" ,  "6" ,  "7" ,  "8"  };
  String[] c =  new  String[a.length + b.length];
  System.arraycopy(a,  0 , c,  0 , a.length);
  System.arraycopy(b,  0 , c, a.length, b.length);
  return  c;
 }