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Object serialization: Difference between revisions
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yellow lab, not trained
trained collie, but doesn't catch frisbee</pre>
=={{header|Groovy}}==
Sample Serializable Classes (borrowed from Java example. Sorta.):
<lang groovy>class Entity implements Serializable {
static final serialVersionUID = 3504465751164822571L
String name = 'Thingamabob'
public String toString() { return name }
}
class Person extends Entity implements Serializable {
static final serialVersionUID = -9170445713373959735L
Person() { name = 'Clement' }
Person(name) { this.name = name }
}</lang>
Writing objects:
<lang groovy>File objectStore = new File('objectStore.ser')
if (objectStore.exists()) { objectStore.delete() }
assert ! objectStore.exists()
def os
try {
os = objectStore.newObjectOutputStream()
os << new Person()
os << 10.5
os << new Person('Cletus')
os << new Date()
os << new Person('Pious')
os << java.awt.Color.RED
os << new Person('Linus')
os << 'just random garbage'
os << new Person('Lucy')
os << ['lists', 'are', 'serializable']
os << new Person('Schroeder')
} catch (e) { throw new Exception(e) } finally { os?.close() }
assert objectStore.exists()</lang>
Reading objects:
<lang groovy>def is
try {
is = objectStore.newObjectInputStream(this.class.classLoader)
is.eachObject { println it }
} catch (e) { throw new Exception(e) } finally { is?.close() }
objectStore.delete()
assert ! objectStore.exists()</lang>
Output:
<pre>Clement
10.5
Cletus
Wed Jan 18 02:07:29 CST 2012
Pious
java.awt.Color[r=255,g=0,b=0]
Linus
just random garbage
Lucy
[lists, are, serializable]
Schroeder</pre>
=={{header|J}}==
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