设计一个有2个JComboBox的Applet程序：

JComboBox1 添加了“计算1+2+3…”，“计算1*1+2*2+3*3…”，“计算1*1*1+2*2*2+3*3*3…”，3个选项。另一个JComboBox2 添加了一百个选项。当选择JComboBox1上某个选项时，text1显示该选项的名称。当在JComboBox2上选择某个选项，程序计算和。例如选择JComboBox1中的“计算1*1+2*2+3*3…”，然后再选择JComboBox2的“前28 项和”，程序将计算连续28 项的平方和。选择合适的布局管理器来布局。

-Design a two JComboBox Applet program:

Calculated JComboBox1 added "1+ 2+ 3..." , "1* 1+ 2+ 3* 3* 2...", "1* 1* 1+ 2* 2* 2+ 3* 3* 3...", 3 options. Another JComboBox2 added one hundred option. When choose an option on the JComboBox1, text1 shows the name of the option. When select a option on JComboBox2, calculation and program. Such as choice of JComboBox1 "compute 1* 1+ 2+ 3* 3* 2..." And then select JComboBox2 28 and "before", program to calculate the sum of the squares of the other 28 consecutive. Choose an appropriate layout manager to layout.