21 lines
663 B
Java
21 lines
663 B
Java
// generics/ObjectHolder.java
|
|
// (c)2020 MindView LLC: see Copyright.txt
|
|
// We make no guarantees that this code is fit for any purpose.
|
|
// Visit http://OnJava8.com for more book information.
|
|
|
|
public class ObjectHolder {
|
|
private Object a;
|
|
public ObjectHolder(Object a) { this.a = a; }
|
|
public void set(Object a) { this.a = a; }
|
|
public Object get() { return a; }
|
|
public static void main(String[] args) {
|
|
ObjectHolder h2 =
|
|
new ObjectHolder(new Automobile());
|
|
Automobile a = (Automobile)h2.get();
|
|
h2.set("Not an Automobile");
|
|
String s = (String)h2.get();
|
|
h2.set(1); // Autoboxes to Integer
|
|
Integer x = (Integer)h2.get();
|
|
}
|
|
}
|