/* package whatever; // don't place package name! */
 
import java.util.*;
import java.io.*;
import java.nio.*;
import java.nio.channels.*;
 
class Ideone {
	public static void main (String[] args) throws java.lang.Exception {
		byte[] fileImage = {0x61, 0x62, 0x63, 0x0, 0x0, 0x5E, (byte)0xD0, (byte)0xB2};
 
		try(InputStream fis = new ByteArrayInputStream(fileImage)){
			ReadableByteChannel ch = Channels.newChannel(fis);
			ByteBuffer buf = ByteBuffer.allocate(64*1024);
			ch.read(buf);
			buf.position(0);
 
			// max 4, null terminated, UTF-8
			String a;
			{
				byte[] bufS = new byte[4];
				buf.get(bufS);
				a = new String(bufS, 0, getTerm(bufS), "UTF-8");
			}
 
			// little endian, unsigned int32
			buf.order(ByteOrder.LITTLE_ENDIAN);
			long b = buf.getInt() & 0xFFFFFFFFL;
 
			System.out.println("a["+a+"] a.len["+a.length()+"] b["+b+"]");
		}
	}
 
	private static int getTerm(byte[] b){
		for(int i=0,sz=b.length; i<sz; i++){
			if(b[i] == 0){return i;}
		}
		return b.length;
	}
}
 

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