JAVA info

Search This Blog

Question

on September 17, 2015

Get link
Facebook
X
Pinterest
Email
Other Apps

Que - IDE prefieres para desarrollar en Java?

1 - Netbean2 - Eclipse3 - jCreator4 - Otro

Get link
Facebook
X
Pinterest
Email
Other Apps

Comments

Throw and Throws keyword in Java.

In interview room most probably asking the question. Throw keyword: First, Forget about java all this thing For example Suppose I want to throw then someone going to catch. assume that here it's a ball game. and I throw the ball to catch someone person, were in java the person who throw the ball is the programmer and the other person catching that exception by JVM for that throw keyword is required. where which is throwable type is only thrown the exception, no other object or class you may throw. Look like.. Let us explain with an example. class Test{ public static void main(String args[]){ System.out.println(10/0); } } exception in thread main java.lang.arithmaticException / by zero at Test.main() In this case, which is the responsible for exception arise. JVM, JVM is responsible for exception handling. it's responsible internally automati...

answer of Last Post.

Last we have saw that about which are valid main method? 1. public static void M ain(String args[]) 2. public static int main(String args[]) 3. public static void main(String [] args) 4. public final synchronized strictfp void main(String[] args) [missing static] 5. public static final synchronized strictfp void main(String[] args) 6. public static void main(String... args) correct answer is.... First 4 is Not correct Ans. Last 2 is Correct Ans. Lets check 1 ) its Main() M is Capital letter. JVM configuration in only main which m is small letter. so 1 is not applicable. 2 ) its int return type. but main method doesn't way to any return. so 2 is not applicable. 3 ) its command line parameters is not array so we must use array String like String[]. so 3 is not applicable. 4 ) its public , final, synchoronized , strictfp, void and also main but one thing is missing is static so 4 is not applicable. because static must be were main method no way any object crea...

How to create Object in JAVA? In Different way?

Question is: How many Ways to create an object in java? Or what is the difference between new keyword or newInstance()? There Is Two way to create an object in java. usually, programmer or developer use the new keyword to create an object. so, how can use it let's check? 1 ) Using new Keyword : suppose one class is Test class so let us create an object of class Test objT = new Test(); Here Above In that Test is class name and objT is object name = using assignment operator and new keyword and Test() were a constructor. ok, so it's very easy to create an object. ok, so here we know that Test class is there in my java file. and we use to perform an operation. But, At run time how to create and you don't know class name at beginning. so that time you using newInstance() to create an object. 2 ) newInstance(): When you don't know class name at beginning or runtime you want to create an object of class so we can yous newInstance(). ex. ...

Powered by Blogger

Question

Que - IDE prefieres para desarrollar en Java?

1 - Netbean2 - Eclipse3 - jCreator4 - Otro

Comments

Post a Comment