Why does the java compiler report only one error at a time?

I have a clip

class T{
    int y;
    public static void main(String... s){
        int x;
        System.out.println(x);
        System.out.println(y);
    }
}

There are two errors, but why only one error is displayed at compile time?

The error displayed is:

non-static variable y cannot be referenced from a static context
    System.out.println(y);
                       ^

But what about this mistake

variable x might not have been initialized
    System.out.println(x);
                       ^

Solution

The java compiler compiles code in several passes Some types of errors are detected in each pass In your example, javac does not see if x can be initialized until the rest of the code is actually passed through the previous compiler