倒序输出插入的数组

Posted 2021-01-15 yangshuyuan1009

import java.util.Arrays;
public class Demo4{
	public static void main(String[] args) {
		int[] a = {1,3,8,10,12};
		a = insert(a,11);
		for (int num :a ) {
			System.out.print(num+" ");
		}
		System.out.println();
	}
	//返回值 int[]
	//参数：int[] a,int num
	public static int[] insert(int[] a,int num){
		// a = Arrays.sort(a);
		if(num>a[a.length-1]){
			return a;
		}
		int index = -1;
		for (int i=0;i<a.length ;i++ ) {
			if(num>=a[i]&&num<=a[i+1]){
				index = i+1;
				break;
			}
		}
		a = Arrays.copyOf(a,a.length+1);
		for (int i = a.length-1;i>index;i--) {
			a[i]=a[i-1];
		}
		a[index] = num;
		return a;
	}
}