Using this.var during var's initialization [duplicate]

Answer 1

Use of simple name is not allowed in case of forward references as per JSL. So it is must to use this keyword to access such variables.

class UseBeforeDeclaration {
    int h = j++;  // error - `j` read before declaration
    int l = this.j * 3;  // ok - not accessed via simple name
    int j;
}