1.设计大小为300×200、背景色为黄色、标题为“Hello Frame”的窗口。窗口中含有两个文本框和一个按钮。程序运行时，在文本框1中输入文本信息，文本框2设置为“只读”，其内容随文本框1而改变。单击“清除”按钮，清除文本框中的文本信息。-Design size of 300,200, the background color is yellow, titled " Hello Frame window. The window contains two text box and a button. The program runs in text box 1, enter the text, the text box is set to " read only" , its contents with the text box change. Click the " Clear"　button to clear the text box text information.