Java ObjectInputStream .readObject ()
Syntax
ObjectInputStream.readObject() has the following syntax.
public final Object readObject() throws IOException , ClassNotFoundException
Example
In the following code shows how to use ObjectInputStream.readObject() method.
/*from ww w.ja v a 2s .c om*/
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
public class Main {
public static void main(String[] args) throws Exception {
String s = "Hello World from java2s.com";
byte[] b = { 'e', 'x', 'a', 'm', 'p', 'l', 'e' };
FileOutputStream out = new FileOutputStream("test.txt");
ObjectOutputStream oout = new ObjectOutputStream(out);
// write something in the file
oout.writeObject(s);
oout.writeObject(b);
oout.flush();
oout.close();
// create an ObjectInputStream for the file we created before
ObjectInputStream ois = new ObjectInputStream(new FileInputStream(
"test.txt"));
// read and print an object and cast it as string
System.out.println((String) ois.readObject());
// read and print an object and cast it as string
byte[] read = (byte[]) ois.readObject();
String s2 = new String(read);
System.out.println(s2);
ois.close();
}
}
The code above generates the following result.
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