Which one gets loaded first? static block or spring bean?

user_5735939 0
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I am autowiring an object of with spring and I am calling a method using the same autowired object. It is throwing NullPointerException. The problem is that I am calling the method inside a static block. Below is my code -

@Autowired
static MyPropertyManagerClass myPropertyManagerClass;

private static URL SERVICE_URL = null;

static {
    try {

        SERVICE_URL = myPropertyManagerClass.getServiceURL();
    }
    catch (Exception e) {
        log.error("Exception Occurred While Invoking myPropertyManagerClass.getServiceURL() : " , e);
    }
}

If I am not wrong, this is happening because static block gets loaded first. Is there any way that I can make this work without creating an object with new keyword?

static spring java
3 Answers

static blocks are invoked when the class is being initialized, after it is loaded. The dependencies of your component haven't been initialized yet. That is why you get a NullPointerException (Your dependencies are null) .

Move your code to a method annotated with @PostConstruct. This will ensure that your code will run when all the dependencies of your component are initialized

user_21937670

static block will always be processed before the spring injection. As suggested by @TheLostMind, "Use @PostConstruct and put your code there". If you want to avoid the new you can use the spring factory-method in your Xml file.

user_16327520

Static would be first. Spring beans would be initialized after BeanPostProcessor initialize level.

user_12866110
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