用int[] arr=new int[]创建数组

Java SE 数组的建立

package javaDemo.java; import java.util.Scanner; public class Zuoye4 {public static void main(String[] args) {int chengji;double sum=0;int[] arr=new int[6];//创建数组int i ,b;for(i=0;i<=5;i++){System.out.println("输入"+(i+1)+"同学的成绩：");Scanner sc=new Scanner(System.in);chengji=sc.nextInt();b=chengji;arr[i]=b;sum=sum+b;}System.out.println(sum/6);//求平均值System.out.println(arr[5]);//根据数组下标输出你要的数字} }