The Interface And Class Hierarchy For Collection

     The interface and class hierarchy for collection

 

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The Interface And Class Hierarchy For Collection 

 Java ArrayList Examples

Java Linkedlist Examples

Java ArrayList Examples

Java ArrayList Examples

Java Vector Examples

Java HashSet Examples

Java LinkedHashSet Examples

Java TreeSet Examples

Java Hashtable Examples

Java HashMap Examples

Java TreeMap Examples

Multithreading in Java

What is Multithreading?
Life Cycle of a Thread
thread vs proccess.
Thread Scheduler
Creating Thread
Sleeping a thread
Start a thread twice
Calling run() method
Joining a thread
Naming a thread
Thread Priority
Daemon Thread
Thread Pool
Synchronization
Messaging
Thread Class
Runnable Interface .
IsAlive()
Join()

Try And Finally Without Catch Block

1. We Can Use Finally after try block ,it will run gives message in finally block.But can not handle exception.
Syntax:

try{


}Finally{


}

public class ExceptionSample {
public static void main(String[] args) {
try {
int i=10/0;
}finally{
System.out.println("Finally Block");
}
System.out.println("You Are Come Back In Main");
}

}

Output:
Exception in thread "main" Finally Block
java.lang.ArithmeticException: / by zero
at exception_handling.ExceptionSample.main(ExceptionSample.java:6)

Finally Block In Java

Finally block always execute after try catch block.

1.
 package exception_handling;

public class FinallyBlock {
           
public static void main(String[] args) {
try {
int i=10/0;
} catch (Exception e) {
System.out.println(e);
}
finally{
System.out.println("You Are In Finally Block");
}
}
}

Output:

java.lang.ArithmeticException: / by zero

You Are In Finally Block

2.

package exception_handling;

public class FinallyBlock {

            

public static void main(String[] args) {

try {

int i=10/10;

} catch (Exception e) {

System.out.println(e);

}

finally{

System.out.println("You Are In Finally Block");

}

}

}

Output:

You Are In Finally Block

3. If You Use Return Statement in try /catch block then finally always execute  

package exception_handling;

public class FinallyReturn {

int display(){

try {

System.out.println("In display try"); 

return 2;

} catch (Exception e) {

System.out.println(e);

}finally{

System.out.println("Hi Finally Here");

}

return 1;

}

public static void main(String[] args) {

FinallyReturn finallyReturn=new FinallyReturn();

finallyReturn.display();

}

}

Output:

In display try

Hi Finally Here

4. If we use exit(0) in  try block then finally block will not execute.

package exception_handling;

public class FinallyExit {

public static void main(String[] args) {

try {

System.out.println("welcome Dear");

System.exit(0);

} catch (Exception e) {

System.out.println(e);

}finally{

System.out.println("Welcome In Finally Block");

}

}

}

Output:

welcome Dear

Java Tutorial

 

Java Tutorial

OOP Concept:

•  Java Variables                
•  Java Operators  and datatypes            
•  Java Statement
•  Access Modifier and Non Access Modifier
•  Class & Object
•  Constructor
•  Exception Handling In Java
•  Inner Class
•  Inheritance
•  String Builder
•  String
•  Thread
•   Array 
•   Polymorphism
•   Method overloading
•   Method overriding
•   Types of polymorphism
•   Inheritance
•   Types of inheritance
•   Encapsulation
•   Static and dynamic binding
•   Static Keyword
•   this keyword 
•   SUPER keyword
•   Final  Keyword 
•   Inner classes
•   Abstract class and methods
•   Interface
•   Access modifiers
•   Packages
• enumeration

• File Handling in Java

      Programs :

• Top 50 core java coding interview question and answer

• Top 30 String programs

• Array Programs

Java Collections Framework Tutorials For Beginners:

• The Interface And Class Hierarchy For Collection 

•  Java ArrayList Examples

• Java Linkedlist Examples 

• Java Vector Examples

• Java HashSet Examples

• Java LinkedHashSet Examples

• Java TreeSet Examples

• Java Hashtable Examples

• Java HashMap Examples

• Java TreeMap Examples

Data Structure in Java