22 lines
785 B
Java
22 lines
785 B
Java
package main.com.kunwar.designpatterns.behavioral.observer;
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public class ObserverPatternDemo {
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public static void main(String[] args) {
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FirstSubscriber firstSubscriber = new FirstSubscriber();
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SecondSubscriber secondSubscriber = new SecondSubscriber();
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ThirdSubscriber thirdSubscriber = new ThirdSubscriber();
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MessagePublisher p = new MessagePublisher();
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p.attach(firstSubscriber);
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p.attach(secondSubscriber);
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p.notifyUpdate(new Update("This is the first update")); //s1 and s2 will receive the update
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p.detach(firstSubscriber);
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p.attach(thirdSubscriber);
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p.notifyUpdate(new Update("This is the second update")); //s2 and s3 will receive the update
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}
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} |