1. what is throwable and where should we use this? 2. How can you increase the JVM memory? 3. Abstract class is a partially implemented class so, How can we call an abstract method without creating... 4. How to Stop the creation of objects(For ex:For Player class of Cricket Team,stop instance creation after... 5. Can HashMap store null values?If yes, how many and in which one? 6. What is the Difference between Runtime and RunTime java API's? 7. How we upload and download files in JSP and Servlets ,What methods we are using?? 8. Why return type is not a part of method signature? 9. what is the difference between String and StringBuffer? 10. Can we create a class in a method if it is possible how

K.Suresh babu

• Jan 2nd, 2007

 

E: 1. what is throwable and where should we use this?...

subhasish_25

 Profile Answers by subhasish_25 

• Jan 11th, 2007

 

 Throwable class is the superclass of all errors and exceptions in the Java language.

Instances of two subclasses, Error and Exception  are conventionally used to indicate that exceptional situations have occurred.

  [ java.lang.Throwable..].......it implements Serilizable interface and extends Objects

ramesh.sure

 Profile Answers by ramesh.sure Questions by ramesh.sure

• Jun 26th, 2008

 

String is Immutable where as StringBuffer is Mutable.Mutable: The objects whose contents can be modified is called as Mutable.Ex: U can try this.String myString = new String( "old String" ); System.out.println( myString ); myString.replaceAll( "old", "new" ); System.out.println( myString ); what the output is, here it is: old String old String