Java – using static init blocks

I know how static init blocks work

Solution

When you want to initialize one or more static variables in one place

It is useful because you can apply exception handling, which is impossible for online initialization

For example:

public static ImageIcon defaultIcon = ImageIO.read(..);

Can initialize

public static ImageIcon defaultIcon;
static {
   try {
       defaultIcon = ImageIO.read(..);
   } catch (IOException ex){
     System.out.println("No default icon available");
   }
}

Another application is complex initialization. For example, if a project needs multiple lines of code to initialize Suppose you have a configuration:

public static Configuration configuration;
static {
     confuguration = new Configuration();
     configuration.setSomething(..);
     configuration.setSomethingElse(..);
     ...
}

The third use is to initialize some external API infrastructure An example of my current project:

static {
    org.apache.xml.security.Init.init();
}

However, as mykola golubyev said, static initialization blocks make code difficult to read, so use them with caution Static methods do the same thing more transparently