java学习p187

public class a1 {
    public static void main(String[] args) {
        int[] arr = {10, 12, 45, 90};//升序数组
        int insertNum = 23;
        int index = -1;
        for (int i = 0; i < arr.length; i++) {//确定插入位置
            if (insertNum <= arr[i]) {
                index = i;
                break;
            }
        }
        if (index == - 1) {
            index = arr.length;
        }
        int[] arrNew = new int[arr.length + 1];
        for (int i = 0; i < arrNew.length; i++) {
            if (i < index) {
                arrNew[i] = arr[i];
            }
            else if (i == index) {
                arrNew[i] = insertNum;
            }
            else {
                arrNew[i] = arr[i - 1];
            }
        }
        for (int i = 0; i  
public class a1 {
    public static void main(String[] args) {
        int[] arr = {10, 12, 45, 90};//升序数组
        int insertNum = 23;
        int index = - 1;
        for (int i = 0; i < arr.length; i++) {//确定插入位置
            if (insertNum <= arr[i]) {
                index = i;
                break;
            }
        }
        if (index == - 1) {
            index = arr.length;
        }
        int[] arrNew = new int[arr.length + 1];
        for (int i = 0, j = 0; i < arrNew.length; i++) {
            if (i != index) {
                arrNew[i] = arr[j];
                j++;
            }
            else {
                arrNew[i] = insertNum;
            }
        }
        for (int i = 0; i