import java.util.Arrays;          public class AddArray {      public static void main(String[] args) {          int[] arr = {1,4,2,4,11,33,22,67,43};          for (int i : sort(arr,23)) {              System.out.print(i+"\t");          }          System.out.println();          for (int i : sort1(arr,45)) {              System.out.print(i+"\t");          }                }      //使用 Arrays.copyOf      public static int[] sort(int[] arr,int num){          int[]copyArr = Arrays.copyOf(arr,arr.length+1);          copyArr[arr.length]=num;          Arrays.sort(copyArr);          return copyArr;      }      //使用  System.arraycopy      public static int[] sort1(int[] arr,int num){          int[]copyArr = new int[arr.length+1];          System.arraycopy(arr,0,copyArr,0,arr.length);          copyArr[arr.length]=num;          Arrays.sort(copyArr);          return copyArr;      }  }