怎么写这个Java程序

Question

编写程序，用System.in.read()方法从键盘接收用户输入的6 个整数，计算并输出这些整数的最大值、最小值、累加和、平均值。

谢谢

Answer 1

我已将在Eclipse+JDK1.4 测试通过，以下为你需要的程序源代码：

import java.io.*;

public class Test {

public static boolean isNumber(String s) {

return s.matches("\\d+");
}

public static int getMaxNumber(int[] numArray) {
int maxTemp = numArray[0];
for (int i = 1; i < numArray.length; i++) {
if (numArray[i] > maxTemp)
maxTemp = numArray[i];
}
return maxTemp;
}

public static int getMinNumber(int[] numArray) {
int minTemp = numArray[0];
for (int i = 1; i < numArray.length; i++) {
if (numArray[i] < minTemp)
minTemp = numArray[i];
}
return minTemp;
}

public static int getSumNumber(int[] numArray) {
int sumTemp=0;
for (int i = 0; i < numArray.length; i++) {
sumTemp+=numArray[i];
}
return sumTemp;
}

public static float getAvgNumber(int[] numArray) {
float avgTemp=0f;
int sumTemp=0;
for (int i = 0; i < numArray.length; i++) {
sumTemp+=numArray[i];
}

avgTemp=(float)(sumTemp/6.0);

return avgTemp;
}

public static void main(String[] args) throws IOException {

System.out.println("请输入6个整数！");
int[] numbers = new int[6];
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
String num = br.readLine();
boolean flag = false; // 校验是否是数字
for (int i = 0; i < 6; i++) {
if (isNumber(num)) {
numbers[i] = Integer.parseInt(num);
num = br.readLine();
flag = true;
} else {
System.out.print("您输入的不是整数，请重新输入！");
flag = false;
break;
}
}

if (flag == true) {
System.out.println("已经正确接受6个整数");
System.out.println("些整数的最大值是："+getMaxNumber(numbers));
System.out.println("些整数的最小值是："+getMinNumber(numbers));
System.out.println("些整数的累加和是："+getSumNumber(numbers));
System.out.println("些整数的平均值是："+getAvgNumber(numbers));
}// end if

}

}

Answer 2

public class A
{
public static void main(String[] args)
{
Scanner in = new Scanner(System.in);
int max = Integer.MIN_VALUE;
int min = Integer.MAX_VALUE;
int sum = 0;
for (int i = 0; i < 6; i++)
{
int j = in.nextInt();
if (max < j) max = j;
if (min > j) min = j;
sum += j;
}
double avg = sum / 6.;
System.out.println("max =" + max);
System.out.println("min =" + min);
System.out.println("sum =" + sum);
System.out.println("avg =" + avg);
}
}