Why doesnt this compile?

[rohan yadav]

 String s1="A";
     String s2=new String(s1);
     String s3="A";
     String s4="a";
     System.out.print(s1==s2 +"," + s2==s3 +"," + s1==s3+"," + s2==s4+"," + s3==s4);   

Why the compiler is giving compiler error??
This question from ExamLab

[Raju Champaklal]

s1==s2+","+s2 will give false....and then you are comparing a boolean with a string which is illegal

[Rafael Angarita]

Yes!...Try enclosing the string comparisons between parenthesis and see what happens!

[Raju Champaklal]

this is because + comes higher in the table than == so first the strings are added and then compared....you get a boolean...and then boolean is compared with a string which is illegal?

understood man?

nice question by the way....this helped clear my concept of the table

[rohan yadav]

Understood now: