Full Externalizable class sample for Codenmae One

MyClass.java

public class MyClass implements Externalizable {
    private static final int VERSION = 2;
    private String name;
    private String value;
    private String domain;
    private Date date;
    private long expires;
    
    public MyClass() {}
        
    public int getVersion() {
        return VERSION;
    }

    public String getObjectId() {
        return "MyClass";
    }
    
    public void externalize(DataOutputStream out) throws IOException {
        Util.writeUTF(name, out);
        Util.writeUTF(value, out);
        Util.writeUTF(domain, out);
        if(date != null) {
            out.writeBoolean(true);
            out.writeLong(date.getTime());
        } else {
            out.writeBoolean(false);
        }
        out.writeLong(expires);
    }

    public void internalize(int version, DataInputStream in) throws IOException {
        name = Util.readUTF(in);
        value = Util.readUTF(in);
        domain = Util.readUTF(in);
        if(version > 1) {
            boolean hasDate = in.readBoolean();
            if(hasDate) {
                date = new Date(in.readLong());
            }
        }
        expires = in.readLong();
    }
}

Sample code for Externalizable.

From the Codename One project