How to execute code after Spring has injected all dependencies of a bean?

In Spring, to execute code after all dependencies of a bean have been injected, you can use the InitializingBean interface or the @PostConstruct annotation.

Example with @PostConstruct:

import javax.annotation.PostConstruct;
import org.springframework.stereotype.Component;

@Component
public class MyBean {

    @PostConstruct
    public void init() {
        // This method will be called after all dependencies are injected
        System.out.println("All dependencies are injected, initialization can proceed");
    }
}

Alternatively, you can implement the InitializingBean interface and override the afterPropertiesSet() method:

import org.springframework.beans.factory.InitializingBean;
import org.springframework.stereotype.Component;

@Component
public class MyBean implements InitializingBean {

    @Override
    public void afterPropertiesSet() throws Exception {
        // Code that will run after dependencies are injected
    }
}

Both methods guarantee that the code will execute after Spring completes injecting all dependencies into the bean.