I have written a small Spring (Version 4) application using @Component, @ComponentScan annotation as below.
Configuration class
@Configuration
@ComponentScan
public class DiskConfig {
}
Bean Class
@Component
public class BlankDisk implements Disk {
private String title;
private String artist;
public BlankDisk(){}
public BlankDisk(@Value("${disk.title}") String title, @Value("${disk.artist}") String artist) {
this.title = title;
this.artist = artist;
}
@Override
public void play() {
System.out.println("The artist " + artist + " is playing the title " + title);
}
}
@Component
public class AutowireDemo {
@Autowired
private BlankDisk blankDisk;
public void play() {
blankDisk.play();
}
}
In the play() method I am getting NullPointerException. The framework couldn't create the BlankDisk instance.
I am very new to Spring. Can anyone help me how to resolve this issue?
