从键盘输入三个整数，分别存入x,y,z三个整型变量中，计算并输出三个数的和以及平均值，结果保留一位小数。java

import java.util.Scanner;

public class Main {
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
int x = input.nextInt();
int y = input.nextInt();
int z = input.nextInt();
int sum = x + y + z;
double average = sum / 3.0;
System.out.printf("三个数的和为：%d，平均值为：%.1f", sum, average);
}
}