# Generate serialVersionUID Script for Java Classes

```bash
#!/bin/bash

# Check if class file exists
if [ ! -f "$1.class" ]; then
  echo "Error: Class file $1.class not found."
  exit 1
fi

# Generate serialVersionUID using md5 hash
serialVersionUID=$(md5sum $1.class | cut -d ' ' -f 1)

# Convert the MD5 hash to a Long value
longSerialVersionUID=$((16#${serialVersionUID:0:16}))

# Ensure the Long value is positive
if [ $longSerialVersionUID -lt 0 ]; then
  longSerialVersionUID=$((longSerialVersionUID + 9223372036854775808))
fi

# Print the generated serialVersionUID as Long with 'L' suffix
echo "Generated serialVersionUID: ${longSerialVersionUID}L"

```
## How to Use

- Save the script - copy the script content and save it in a file named `generate_serialVersionUID.sh`, for instance
- Make it executable - to make the script executable run

```shell
$ chmod +x generate_serialVersionUID.sh
```
- Generate serialVersionUID - navigate to the directory containing your `.class` file and run the script using (replacing `ClassName` with your class name)

```shell
$ ./generate_serialVersionUID.sh ClassName
```