Mega Code Archive
Object serialization with Serializable interface, ObjectOutputStream and ObjectInputStream
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import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
class MyClass implements Serializable {
String str;
double[] vals;
File fn;
public MyClass(String s, double[] nums, String fname) {
str = s;
vals = nums;
fn = new File(fname);
}
public String toString() {
String data = " str: " + str + "\n vals: ";
for (double d : vals)
data += d + " ";
data += "\n fn: " + fn.getName();
return data;
}
}
public class Main {
public static void main(String[] argv) throws Exception {
double v[] = { 1.1, 2.2, 3.3 };
double v2[] = { 9.0, 8.0, 7.7 };
MyClass obj1 = new MyClass("This is a test", v, "Test.txt");
MyClass obj2 = new MyClass("Alpha Beta Gamma", v2, "Sample.dat");
ObjectOutputStream fout = new ObjectOutputStream(new FileOutputStream("obj.dat"));
System.out.println("obj1:\n" + obj1);
fout.writeObject(obj1);
System.out.println("obj2:\n" + obj2);
fout.writeObject(obj2);
fout.close();
ObjectInputStream fin = new ObjectInputStream(new FileInputStream("obj.dat"));
MyClass inputObj;
inputObj = (MyClass) fin.readObject();
System.out.println("First object:\n" + inputObj);
inputObj = (MyClass) fin.readObject();
System.out.println("Second object:\n" + inputObj);
fin.close();
}
}
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