|
| |
| 12. 4. 4. 类型参数界 |
|
|
|
import static java.lang.Math.random;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
public class MainClass {
public static void main(String[] args) throws Exception {
LinkedList<Integer> numbers = new LinkedList<Integer>();
for (int i = 0; i < 10; i++) {
numbers.addItem(1 + (int) (100.0 * random()));
}
System.out.println("\nnumbers list contains:");
listAll(numbers);
String filename = "C:/Numbers.bin";
ObjectOutputStream objOut = new ObjectOutputStream(new FileOutputStream(filename));
objOut.writeObject(numbers);
objOut.close();
LinkedList<Integer> values = null;
ObjectInputStream objIn = new ObjectInputStream(new FileInputStream(filename));
values = (LinkedList<Integer>) (objIn.readObject());
objIn.close();
System.out.println("\nvalues list contains:");
listAll(values);
}
static void listAll(LinkedList<Integer> list) {
Integer number = list.getFirst();
int count = 0;
do {
System.out.printf("%5d", number);
if (++count % 5 == 0) {
System.out.println();
}
} while ((number = list.getNext()) != null);
}
}
|
|
numbers list contains:
39 63 34 47 86
88 21 39 40 1
values list contains:
39 63 34 47 86
88 21 39 40 1 |
|