Java Tutorial/Development/CRC32
CRC32 check
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.zip.CRC32;
import java.util.zip.Checksum;
public class MainClass {
public static void main(String[] args) throws IOException {
FileInputStream fin = new FileInputStream(args[0]);
System.out.println(args[0] + ":\t" + getCRC32(fin));
fin.close();
}
public static long getCRC32(InputStream in) throws IOException {
Checksum cs = new CRC32();
// more efficient to read chunks of data at a time
for (int b = in.read(); b != -1; b = in.read()) {
cs.update(b);
}
return cs.getValue();
}
}