求若干整数的最大值、最小值和平均值。输入若干整数或浮点数，求出最大值和最小值并显示。要求：使用JTextField数组或表格，数组值可变；响应事件，计算最大值、最小值和平均值时忽略空值和空串；按实际元素个数求值；解决除数为0问题。-Find the maximum, minimum, and average values ​ ​ of certain integer. Enter the number of integer or floating-point numbers, find the maximum and minimum values ​ ​ and display. Requirements: use JTextField array or table, the array values ​ ​ variable　respond to events, calculates the maximum, minimum and mean ignoring null values ​ ​ and empty string　evaluated the actual number of elements　solve divisor 0.