45 lines
1.3 KiB
Java
45 lines
1.3 KiB
Java
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//: io/SerialCtl.java
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// Controlling serialization by adding your own
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// writeObject() and readObject() methods.
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import java.io.*;
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public class SerialCtl implements Serializable {
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private String a;
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private transient String b;
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public SerialCtl(String aa, String bb) {
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a = "Not Transient: " + aa;
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b = "Transient: " + bb;
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}
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public String toString() { return a + "\n" + b; }
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private void writeObject(ObjectOutputStream stream)
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throws IOException {
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stream.defaultWriteObject();
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stream.writeObject(b);
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}
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private void readObject(ObjectInputStream stream)
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throws IOException, ClassNotFoundException {
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stream.defaultReadObject();
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b = (String)stream.readObject();
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}
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public static void main(String[] args)
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throws IOException, ClassNotFoundException {
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SerialCtl sc = new SerialCtl("Test1", "Test2");
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System.out.println("Before:\n" + sc);
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ByteArrayOutputStream buf= new ByteArrayOutputStream();
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ObjectOutputStream o = new ObjectOutputStream(buf);
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o.writeObject(sc);
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// Now get it back:
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ObjectInputStream in = new ObjectInputStream(
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new ByteArrayInputStream(buf.toByteArray()));
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SerialCtl sc2 = (SerialCtl)in.readObject();
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System.out.println("After:\n" + sc2);
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}
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} /* Output:
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Before:
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Not Transient: Test1
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Transient: Test2
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After:
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Not Transient: Test1
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Transient: Test2
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*///:~
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