相同的代码,为何写在单独的类里就会出问题
时间:2008-05-13 17:48:49
来源:论坛整理 作者: 编辑:chinaitzhe
- Java code
Code highlighting produced by Actipro CodeHighlighter (freeware) http://www.CodeHighlighter.com/ import javax.microedition.io.*; import java.io.*; public class ReadRemote { private String strResult; private String url; private StringBuffer result; public ReadRemote(String url) { this.url = url; } public void readRemote() { HttpConnection hc = null; try { char ch; hc=(HttpConnection)Connector.open(url); //运行时停滞在这里啦 InputStreamReader isr=new InputStreamReader(hc.openInputStream(),"gb2312"); while((ch=(char)isr.read())!=(char)-1){ result.append(ch); } } catch (IOException e) { e.printStackTrace(); } strResult=new String(result.toString()); } ......
为什么写在class MyClass extends MIDlet里面就可以读到url的内容呢
网友回复:你的MIDlet这个里面有什么?
网友回复:
- Java code
Code highlighting produced by Actipro CodeHighlighter (freeware) http://www.CodeHighlighter.com/ import javax.microedition.lcdui.*; import javax.microedition.io.*; import javax.microedition.midlet.*; import java.io.*; public class HttpRead extends MIDlet { private String url; private StringBuffer result; private Display display; private TextBox t; public HttpRead() { url = "http://192.168.1.101/web/index.xml"; display=Display.getDisplay(this); result=new StringBuffer(); } public void startApp(){ HttpConnection hc=null; try{ char ch; hc=(HttpConnection)Connector.open(url); System.out.println(hc.toString()); InputStreamReader isr=new InputStreamReader(hc.openInputStream(),"gb2312"); while((ch=(char)isr.read())!=(char)-1){ result.append(ch); } }catch(IOException e){ e.printStackTrace(); }catch(Throwable e){ e.printStackTrace(); } t=new TextBox("title",result.toString(),1000,0); display.setCurrent(t); } public void destroyApp(boolean nucondional){ } public void pauseApp(){ } }
这个运行正常,可要是在里面实例化上面的ReadRemotel类,用ReadRemote的对象来访问url就停在Connector.open处了
网友回复:你可以把访问网络的程序写在线程里面在试试!
网友回复:char ch;
改成char ch=''或者char ch=null;
试下
关键字:相同,代码,写在,单独,问题,
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