Calculate the size of an InputStream

sizeChecker.java

package size_checker;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;

public class SizeChecker {
	
	private static final String SMALL_PDF = "small.pdf";
	private static final String LARGE_PDF = "large.pdf";
	
	public static void main(String[] args) {
		long size = 0;
		int chunk = 0;
		long start = 0;
		InputStream is = null;
		File largeFile = new File(LARGE_PDF);
		try {
			start = System.currentTimeMillis();
			is = new FileInputStream(largeFile);
			byte[] buffer = new byte[1024];
			while((chunk = is.read(buffer)) != -1){
				size += chunk;
			}
		} catch (FileNotFoundException e) {
			System.out.println("Failed to open file stream:" + e.getMessage());
		} catch (IOException e) {
			System.out.println("Failed to read from file stream:" + e.getMessage());
		}finally{
			if(is != null){
				try {
					is.close();
				} catch (IOException e) {
					System.out.println("Failed to close InputStream: " + e.getMessage());
				}
			}
			long done = System.currentTimeMillis() - start;
			System.out.println(String.format("took %d milliseconds", done));
		}
		System.out.println("size: " + size + " bytes");
	}

}