Why do I g开发者_如何转开发et an exception called NullPointerException if in Java there is no such concept as a pointer?There are no general purpose pointers in Java, that you can easily manipulate by
I have a Java software that was recently integrated into another Java software (which I will call \"external\" software). We use listeners and call back开发者_如何学JAVA mechanisms for \"communication
Suppose I have a char* elem that is supposed to hold a char**, such that elem[0] = char**, elem[1...m]= <more chars>. Is there a way I can put a null ptr within char* elem? When I try to set ele
I know I can find out if a v开发者_JAVA百科ariable is null in Java using these techniques: if (var==null) -> too much work
This was the question asked in an interview. NullPointerException is very common; why is it not declared as a checked exception? I googled but d开发者_JAVA技巧id not get a proper answer.Almost every m
I am getting nullpointerexception, don\'t know what actually 开发者_JAVA百科is causing it. I read from java docs that fileinputstream only throws securityexception so don\'t understand why this except
I got this error message and I\'m not quite sure whats wrong: Exception in thread \"main\" java.lang.NullPointerException
I had a problem making a Blackberry app. I found some guy who made a tutorial which did what I attempted with mine. I copied the code of the tutorial\'s app to try and recreate it, just to see it in a
This is my code: package test; import java.util.logging.Level; import java.util.logging.Logger; class Data{
Recently a co-worker of mine wrot开发者_JAVA技巧e in some code to catch a null pointer exception around an entire method, and return a single result. I pointed out how there could\'ve been any number
加载中,请稍侯......