What's a good way to make sure an init method is invoked in java? The alternatives I see are

• Don't test it, let the method fail by itself, likely by a NullPointerException
• Test if method was initialized or throw

public void foo() {
     if (!inited) {
         throw new IllegalArgumentException("not initalized");
     }
     ...
}

• Delagate

public void foo() {
     if (!inited) {
         throw new IllegalArgumentException("not initalized");
     }
     fooInternal();
}

private void fooInternal(){ ... };

• Always init, and make init a noop otherwise

public void foo() {
     init();
     ...
}
public void init() {
     if(!inited) {
         ...
     }
}

• Silently init

public void foo() {
     if (!inited) {
         init();
     }
     ...
}

Most of these approaches are very verbose and decreases overall readability.