遇到Java JTable问题

Question

我需要帮助创建一个程序，然后我在Main中将所有值输出到表中。该函数是球体，圆锥体和矩形的体积值。我所遇到的问题就是我在互联网上看到的所有例子都是你已经在表格中声明了这样的事情

import javax.swing.JFrame;

    String[] columnNames = {"First Name",
                            "Last Name",
                            "Sport",
                            "# of Years",
                            "Vegetarian"};

    Object[][] data = {
    {"Kathy", "Smith",
     "Snowboarding", new Integer(5), new Boolean(false)},
    {"John", "Doe",
     "Rowing", new Integer(3), new Boolean(true)},
    {"Sue", "Black",
     "Knitting", new Integer(2), new Boolean(false)},
    {"Jane", "White",
     "Speed reading", new Integer(20), new Boolean(true)},
    {"Joe", "Brown",
     "Pool", new Integer(10), new Boolean(false)}
    };