Java – How to generate serialVersionUID

May 14, 2020January 15, 2010 by mkyong

This article shows you a few ways to generate the serialVersionUID for serialization class.

1. serialver

JDK has a built-in command serialver to generate a serialVersionUID automatically.

In this example, we use serialver to generate a serialVersionUID for an Address class.

Terminal


$ serialver Address

Address:    static final long serialVersionUID = -687991492884005033L;

2. Eclispe IDE

For Eclipse IDE, move the mouse over the serialization class, or click on the serialization class and press CTRL + 1.

3. Intellij IDEA

Unlinke Eclipse IDE, we need to enable the auto generate serialVersionUID option manually. Refer to this guide – How to generate serialVersionUID in Intellij IDEA

4. 1L

Puts serialVersionUID=1L; It should be sufficient in most cases.


private static final long serialVersionUID = 1L;

Further Reading
What is serialVersionUID

References

mkyong

Founder of Mkyong.com, passionate Java and open-source technologies. If you enjoy my tutorials, consider making a donation to these charities.

11 Comments

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Jepa

5 years ago

Netbeans ???

Mohamed

16 years ago

Hi,

In Eclipse wa can also do that for a set of classes :

ource Cleanup…->Custome Profile->Missing Code->Add serial version ID

Thx.

Vidhi

6 years ago

Thanks for this

geetansh

9 years ago

Very nice..

lova

9 years ago

Nice tutorial.. its good Help for the Beginners

Wang Zhengyi

11 years ago

thanks, this is very useful for me!

Brennen

13 years ago

Thanks this helped me a lot, as I was trying to get it through batch files…
I can now find it with the click of a button in eclipse.

????

13 years ago

thx,very useful.

jason

14 years ago

another way to generate serialVersionUID(only for jdk1.6 or higher) :

		// compile the java source code in the memory
		JavaCompiler compiler = ToolProvider.getSystemJavaCompiler();
		DiagnosticCollector diagnostics = new DiagnosticCollector();
		JavaFileObject file = new JavaSourceFromString("com.xx.yy.HelloWord", "java source string here");
		Iterable compilationUnits = Arrays.asList(file);
		JavaCompiler.CompilationTask task = compiler.getTask(null, null, diagnostics, null, null, compilationUnits);
		if (task.call()) {
			ObjectStreamClass osc = ObjectStreamClass.lookupAny(Class.forName("com.xx.yy.HelloWord"));
			long svuid = osc.getSerialVersionUID();
		}
======================================
public class JavaSourceFromString extends SimpleJavaFileObject {

	private String code;

	public JavaSourceFromString(String name, String code) {
		super(URI.create("string:///" + name.replace('.', '/') + Kind.SOURCE.extension), Kind.SOURCE);
		this.code = code;
	}

	public CharSequence getCharContent(boolean ignoreEncodingErrors) {
		return code;
	}
}

Sufyan Shoaib

15 years ago

Thanks, helped me.

Luis Eduardo Pinheiro