StringDemoExample

StringByteEx

public class StringByteEx {
public static void main(String[] args) {
byte[] b = { 97, 98, 99, 100,101,102,103,104 };
String str = new String(b);
System.out.println(str);
}
}

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Handler mappings

1.  BeanNameUrlHandlerMapping

2.  SimpleUrlHandlerMapping

3.  ControllerClassNameHandlerMapping

4.  CommansPathMapHandlerMapping

5.  DefaultAnnotationHandlerMapping

6.  RequestMappingHandlerMapping

7. AbstractControllerUrlHandlerMapping

8. AbstractDetectingUrlHandlerMapping

9. AbstractHandlerMapping

10. AbstractHandlerMethodMapping

11. AbstractUrlHandlerMapping

12. ControllerBeanNameHandlerMapping

13. RequestMappingInfoHandlerMapping

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What are the possible values that a boolean data type can hold?

The boolean can hold true or false.

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Message

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Are object references defaulted?

Yes. Object references are defaulted to null.

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What are the default values of primitive data types?

The default values of primitive data types are
boolean data type is false.
byte, short, int and long is 0.
float and double is 0.0.
char is ‘u000’.

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Why the main method is declared static?

main method is the entry point for a Java application and main method is called by the JVM even before the instantiation of the class hence it is declared as static. static methods can be called even before the creation of objects.

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What is the argument of main method?

main method accepts an array of String objects as argument.

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What is the return type of the main method?

Main method doesn’t return anything hence declared void.

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What are the types of variables?

There are 3 types of variables in Java.
They are
Local variables
Instance variables
Class variables