input                              | type                    | length | hashCode   | bytes
        "12345678"                         | ByteArrayBackedHashCode | 4      | 0x78563412 | toBytes(0x12, 0x34, 0x56, 0x78)
        "CAFEBABE"                         | ByteArrayBackedHashCode | 4      | 0xBEBAFECA | toBytes(0xCA, 0xFE, 0xBA, 0xBE)
        "abbaabba"                         | ByteArrayBackedHashCode | 4      | 0xBAABBAAB | toBytes([0xAB, 0xBA] * 2)

    out.writeByte((byte) 200);
    out.writeChar('a');
    out.writeShort((short) -30000);
    out.writeShort((short) 50000);
    out.writeInt(0xCAFEBABE);
    out.writeLong(0xDEADBEEFCAFEBABEL);
    out.writeUTF("Herby Derby");
    out.writeFloat(Float.intBitsToFloat(0xCAFEBABE));
    out.writeDouble(Double.longBitsToDouble(0xDEADBEEFCAFEBABEL));

    byte[] data = baos.toByteArray();

    /* Setup input streams */

    out.writeByte((byte) 200);
    out.writeChar('a');
    out.writeShort((short) -30000);
    out.writeShort((short) 50000);
    out.writeInt(0xCAFEBABE);
    out.writeLong(0xDEADBEEFCAFEBABEL);
    out.writeUTF("Herby Derby");
    out.writeFloat(Float.intBitsToFloat(0xCAFEBABE));
    out.writeDouble(Double.longBitsToDouble(0xDEADBEEFCAFEBABEL));

    byte[] data = baos.toByteArray();

    /* Setup input streams */

    out.writeByte((byte) 200);
    out.writeChar('a');
    out.writeShort((short) -30000);
    out.writeShort((short) 50000);
    out.writeInt(0xCAFEBABE);
    out.writeLong(0xDEADBEEFCAFEBABEL);
    out.writeUTF("Herby Derby");
    out.writeFloat(Float.intBitsToFloat(0xCAFEBABE));
    out.writeDouble(Double.longBitsToDouble(0xDEADBEEFCAFEBABEL));
  }

  public void testReadFully() throws IOException {

import java.io.IOException;
import java.io.InputStream;

/**
 * Utility class which operates directly on Java class files.
 */
public class JavaClassUtil {

    private static final int MAGIC_BYTES = 0xCAFEBABE;

    private JavaClassUtil() {
        // Private to prevent instantiation.
    }

    /**
     * Get the class file major version from the provided {@code file}.
     *

	Cmdsz  uint32
	Flags  uint32
}

const (
	fileHeaderSize32 = 7 * 4
	fileHeaderSize64 = 8 * 4
)

const (
	Magic32  uint32 = 0xfeedface
	Magic64  uint32 = 0xfeedfacf
	MagicFat uint32 = 0xcafebabe
)

// A Type is the Mach-O file type, e.g. an object file, executable, or dynamic library.
type Type uint32

const (
	TypeObj    Type = 1
	TypeExec   Type = 2
	TypeDylib  Type = 6
	TypeBundle Type = 8