java - Using this.var during var's initialization -

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• recursive initializer works when add “this”? 3 answers

while researching another question, surprised discover following java code compiles without errors:

public class clazz {     int var = this.var + 1; } 

in jdk6, var gets initialized 1.

does above code have well-defined semantics, or behaviour undefined? if it's well-defined, please quote relevant parts of jls.

it mentioned in passing in example 8.3.2.3-1 in section 8.3.2.3. in text example

class z {     static int peek() { return j; }     static int = peek();     static int j = 1; } class test {     public static void main(string[] args) {         system.out.println(z.i);     } } 

the caption says:

... variable initializer uses class method peek access value of variable j before j has been initialized variable initializer, @ point still has default value (§4.12.5).

this should map directly situation.