OnJava8-Examples/generics/ObjectHolder.java at master · CSapprenticeWT/OnJava8-Examples · GitHub

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// generics/ObjectHolder.java

// 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();

}