java4ever.java

j2me编写的解压缩程序！已经试过了

import java.io.*;
import javax.microedition.lcdui.*;
import javax.microedition.midlet.*;

import com.java4ever.apime.io.*;

public class Java4Ever extends MIDlet
{
	protected void startApp() throws MIDletStateChangeException
	{
		Runtime runtime=Runtime.getRuntime();
		doGC();
		long memory1=runtime.totalMemory(),memory2=0,memory3=0,memory4=0;
		long free1=runtime.freeMemory(),free2=0,free3=0,free4=0,time1=0,time10=0;
		try
		{
			InputStream is=getClass().getResourceAsStream("/rfc1951.txt.gz");
			ByteArrayOutputStream baos=new ByteArrayOutputStream();
			int i=-1;
			while ((i=is.read())!=-1) baos.write(i);
			is.close();
			byte compressed[]=baos.toByteArray();
			doGC();
			//
			free2=runtime.freeMemory();
			memory2=runtime.totalMemory();
			time1=System.currentTimeMillis();
			byte data[]=GZIP.inflate(compressed);
			time1=System.currentTimeMillis()-time1;
			free3=runtime.freeMemory();
			memory3=runtime.totalMemory();
			//
			doGC();
			free4=runtime.freeMemory();
			memory4=runtime.totalMemory();
			time10=System.currentTimeMillis();
			for (i=0;i<10;i++)
				data=GZIP.inflate(compressed);
			time10=System.currentTimeMillis()-time10;
			
			Form form=new Form("results");
			form.append("src."+compressed.length+" dec."+data.length);
			Display.getDisplay(this).setCurrent(form);
		}
		catch (Exception ex)
		{
			ex.printStackTrace();
		}
//		Form form=new Form("results");
//		form.append("\n1: "+free1+"/"+memory1);
//		form.append("\n2: "+free2+"/"+memory2);
//		form.append("\n3: "+free3+"/"+memory3);
//		form.append("\n4: "+free4+"/"+memory4);
//		form.append("\nmemory: "+(free2-free3-37897));
//		form.append("\ntime 1: "+time1);
//		form.append("\ntime 10: "+time10);
//		Display.getDisplay(this).setCurrent(form);
	}

	protected void pauseApp()
	{
	}

	protected void destroyApp(boolean b) throws MIDletStateChangeException
	{
	}

	private void doGC()
	{
		long time=System.currentTimeMillis();
		while (System.currentTimeMillis()-time<2000) System.gc();
	}
}