resourcestream.java

J2ME开发实例,内含有可运行的实例代码!

//ResourceStream.java
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
import javax.microedition.io.* ;
import java.io.*;
public class ResourceStream extends MIDlet
{
	private Display display;
	private StringItem item;

	public void startApp()
	{
		display = Display.getDisplay(this);
		Form form = new Form( "ResourceStream" );
		item = new StringItem("","");
		Display.getDisplay (this).setCurrent (form);

		String url = "ResourceStream.java" ;
		try{
			String s = readFromJar(url) ;
			form.append( s );
		}catch(Exception e)
		{
			e.printStackTrace();
		}
	}
	String readFromJar(String fileName) throws IOException 
	{
		InputStream is = null;
		InputStreamReader isr = null;
		StringBuffer buff = new StringBuffer();

		try 
		{
            is = getClass().getResourceAsStream(fileName);
			isr = new InputStreamReader( is, "utf-8" );

			while( true )
			{
				int c = isr.read();
				if( c==-1 ) break;
				buff.append( (char) c );
			}
			System.out.println(buff);
		} 
		catch( Exception e )
		{
			System.err.println( e );
		}
		finally 
		{
			if (isr != null)isr.close();
		}
		return buff.toString();
	}

	public void pauseApp()
	{}
	public void destroyApp(boolean unconditional)
	{}
}