求下标长度

import java.util.*;
public  class  Demo3
{
	public static void main(String[] args) {
		int[] a={1,2,3};
		add(a);
		System.out.println(add[0];
		int[] b={4,6,1,9,2};
		sort(b);
		for (int num :array ) {
			System.out.println(num);
		}
		System.out.println();
	}
	public  static   void  add(int[] array){
			array[0]++;
			System.out.println(array[0]);

	}

	public  static  void  sort(int[] array){
		for(int i=0;i<array.length-1;i++){
			for(int j=0;j<=array.length-i-1;j++){
				if(array[j]>array[j+1]){
					int num=array[j];
					array[j]=array[j+1];
					array[j+1]=num;
				}
			}

		}

		}
		public  static   int[] span(int[] array){
			array=Arrays.copyOf(array,array.length+1);
			System.out.println(array.length);6
			return array;
		}
	}