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8 http://www.pku.edu.cn/ <htmI> <heade<title><. ></title></head> <body connect TextField a Frame主类 TextArea c str=a getText action line strb. readlineo URL urlnew URL(str) Button CappendText(line_str) URL url b-urL.openStreamOr DataInputStream b8 8.2 使用URL 例:从给定的位置中读数据(ReadURLData.prj) http://www.pku.edu.cn/ connect <html> <head><title><...></title></head> <body> action URL url Button Frame主类 str=a.getText() b=url.openStream() TextArea c line_str=b.readLine() c.appendText(line_str); TextField a URL url=new URL(str) DataInputStream b