SCJP考题中的陷阱

　

SCJP 考题中的陷阱

原著 Ajith Kallambella

(1) Two public classes in the same le. (illegal)

(2) Main method calling a non-static method. (illegal)

(3) Methods with the same name as the constructor(s). (这种题常有)

(4) Thread initiation with classes that do not have a run() method.

(常考之题)

(9) Private constructors. (legal)

(10) An assignment statement which looks like a comparison. (比如

说 if(a=true),对于这种题眼睛亮一点)

(11) System.exit() in try-catch-nally blocks. (nally 不会执行)

(12) Order of try-catch-nally blocks matters. (若顺序错的话: error: No

try before catch)

(13) main() can be declared nal. (OK)

(14) -0.0 == 0.0 is true.

(15) A class without abstract methods can still be declared abstract.

(16) RandomAccessFile descends from Object and implements