decode flate-decode part how to in pdf

ProcessFlateDecode.java

import java.io.*;
import java.util.*;
import java.util.zip.*;

class ProcessFlateDecode {

	private File f;
	public ProcessFlateDecode(File f){
		this.f=f;
	}
	public void process() throws Exception{

		ArrayList list = new ArrayList();

		FileInputStream ins = new FileInputStream(f);

		while(true){
			int data = ins.read();
			if(data==-1) break;

			list.add( data );
		}
		ins.close();


		int compressedDataLength = list.size();
		byte[] output = new byte[compressedDataLength];
		for(int i=0; i<list.size(); i++){
			Integer o=(Integer)list.get(i);
			output[i]=(byte)(o.intValue());
		}

		Inflater decompresser = new Inflater();
		decompresser.setInput(output, 0, compressedDataLength);
		byte[] result = new byte[100];
		int resultLength = decompresser.inflate(result);

		decompresser.end();

		String outputString = new String(result, 0, resultLength, "UTF-8");
		System.out.println(outputString);
	}

	public static void main(String[] args) throws Exception{
		new Decode(new File(args[0])).process();
	}
}