Can Jdk8 static variables be serialized?

First of all, static variables cannot be serialized.

Verification:

Entity class:

@Data
public class SysRole implements Serializable {

    // Role ID
    private BigInteger id;
    // Role name
    private String name;
    // Role code to determine if it is a system administrator
    private String code;
    // Role description
    private String description;
    // Creator ID
    private BigInteger createBy;
    // Modifier ID
    private BigInteger modifyBy;
    // Status: 0 - disabled, 1 - enabled
    private int status;
    // Creation time
    private Date created;
    // Last update time
    private Date lastUpdateTime;
    
    private static String remark;
    
    public void setRemark(String remark){
        this.remark = remark;
    }
    
    public String getRemark(){
        return remark;
    }
}

Serialization:

SysRole sysRole = new SysRole();
sysRole.setName("213");
sysRole.setCreated(new Date());
sysRole.setCode("132");
System.out.println(sysRole.toString());
sysRole.setRemark("how");
ObjectOutputStream objectOutputStream = new ObjectOutputStream(new FileOutputStream("d:/user.txt"));
objectOutputStream.writeObject(sysRole);

Deserialization:

ObjectInputStream objectInputStream = null;
try {
    objectInputStream = new ObjectInputStream(new FileInputStream("d:/user.txt"));
} catch (IOException e) {
    throw new RuntimeException(e);
}
SysRole readObject = null;
try {
    readObject = (SysRole)objectInputStream.readObject();
} catch (IOException e) {
    throw new RuntimeException(e);
} catch (ClassNotFoundException e) {
    throw new RuntimeException(e);
}
System.out.println(readObject.getRemark());

Result:

Exception
Deserialization code:

---------Added code------------
SysRole sysRole = new SysRole();
sysRole.setRemark("what");
---------Added code------------

ObjectInputStream objectInputStream = null;
try {
    objectInputStream = new ObjectInputStream(new FileInputStream("d:/user.txt"));
} catch (IOException e) {
    throw new RuntimeException(e);
}
SysRole readObject = null;
try {
    readObject = (SysRole)objectInputStream.readObject();
} catch (IOException e) {
    throw new RuntimeException(e);
} catch (ClassNotFoundException e) {
    throw new RuntimeException(e);
}
System.out.println(readObject.getRemark());

Result:

Reason analysis:

In other words, static variables are stored on the class object. Therefore, after sysRole sets the remark, it will be saved on the class object for subsequent use by SysRole objects.