Skip to main content

Q) Develop a java application that terminates abnormally if exception is raised but not handled.




A)
class withouthandling {

       public static void main(String[] args) {
              int n,d,q=1;
              System.out.println("program is started :");
              n=Integer.parseInt(args[0]);
              d=Integer.parseInt(args[1]);
              q=n/d;
              System.out.println("the result of division is :"+q);
              System.out.println("the application completely executed");
       }

}

Run: Java withouthandling 10 0

->when we supply “10” , “0” the program is terminated abnormally. Because exception is raised at run time. But compiler doesn’t raised error. But JVM raised the exception (Arithmetic Exception).
->whenever JVM find the exception it calibrate the what kind of Exception abnormal.
->then corresponding class is (library class) load into memory.
->creates the Exception object and throws.
->so that Exception object can’t catch by anybody.
->so, that’s why this program is terminated abnormally.

Comments

Post a Comment

Popular posts from this blog

Q) Explain repeated deletion of records.

A) //RepeatedDeletion.java import java.util.Scanner; import java.sql.*; class RepeatedDeletion {        public static void main(String[] args) {               Connection con= DriverManager. getConnection ( "jdbc:odbc:prince" , "scott" , "tiger" );               PreparedStatement ps=con.PreparedStatement( "DELETE FROM ACCOUNT WHERE ACCNO=?" );               Scanner s= new Scanner(System. in );               while ( true )               {                      System. out .println( "Enter accno : " );      ...
Post a Comment
Read more

Q) Retrieving data from database?

A)   ->to retrieve the data from database we need to submit SELECT statement from JDBC application. -> executeQuery() method of statement object is used for this purpose. This method has the fallowing ResultSet executeQuery(String sql) throws SQLException Ex: ResultSet rs = st.executeQuery(“SELECT * FROM ACCOUNT”); ->objectoriented representation of tables formate data is called ResultSet object. Ao the driver created one object i.e. ResultSet object. ->object orientation representation of a table of records returned from db is nothing but “ ResultSet ” object.  
Post a Comment
Read more

Q) What is the purpose of JDBC?

A) -> Java application can do any task by making a method (function) call. ->java method calls are not understandable to database management system. They can understand only SQL statements. ->SQL statements can’t be directly used in a java application. Java compiler complains. ->therefore, we say that java environment and database environment are heterogeneous to each other. Purpose of JDBC: ->for any kind of java application to communicate with any kind of database (management system) in a standard manner, JDBC is used.
Post a Comment
Read more