java 数组插入元素

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;
    }
}