NullPointerException on String Objects
What can go wrong if you replace &emp;&emp; with &emp; in the following code:
String a=null;
if (a!=null && a.length()>10) {
...
}
✍: FYIcenter
A single ampersand here would lead to a NullPointerException.
2007-03-03, 5500👍, 0💬
Related Topics:
States of a Thread
What are the high-level thread states? The high-level thread states are ready, running, waiting, and dead. 2007-03-03, 7611👍, 0💬
Vector and ArrayList Classes
What is the main difference between a Vector and an ArrayList? Java Vector class is internally synchronized and ArrayList is not. 2007-03-03, 7240👍, 0💬
Modifiers on Inner Classes
What modifiers may be used with an inner class that is a member of an outer class? A inner class may be declared as public, protected, private, static, final, or abstract. 2007-03-03, 5860👍, 0💬