javanullobject-reference

Object reference is not initialized as null in JAVA

According to rule in JAVA if object reference is declared but not initialized then JAVA initializes it by null. So why is this error is occuring in my code ? Plaese help me out.

Main.java:28: error: variable obj might not have been initialized
        if(obj==null)
           ^

class c {
    int age=12;
    c variable123;
}
public class A {
    c obj;
    if (obj==null) System.out.println(obj);
}
Solution

  • You've misread the documentation. The class (non-final) variables are initialized with null values, the local values are not initialized and cause compiler error.

    See https://docs.oracle.com/javase/specs/jls/se17/html/jls-16.html for details.