Answer / sivasubramanian.k

(1)A declaration tag places a variable definition inside
the body of the java servlet class. Static data members may
be defined as well. Also inner classes should be defined
here.
Example:<%! int serverInstanceVariable = 1; %>

Declaration tags also allow methods to be defined.

<%!
/**
* Converts the Object into a string or if
* the Object is null, it returns the empty string.
*/
public String toStringOrBlank( Object obj ){
if(obj != null){
return obj.toString();
}
return "";
}
%>

(2)A scriptlet tag places the contained statements inside
the _jspService() method of the java servlet class.

<% int localStackBasedVariable = 1;
out.println(localStackBasedVariable); %>

(3)An expression tag places an expression to be evaluated
inside the java servlet class. Expressions should not be
terminated with a semi-colon .

<%= "expanded inline data " + 1 %>

(4)Also we can use the following tag to give comments in
jsp:

<%-- give your comments here --%>

Explain inner classes ?

0 Answers  

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What are constants?

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Does string is thread-safe in java?

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What is variable and its types?

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Map map = new HashMap(2); map.add(“1”,”one”); map.add(“2”,”two”); map.add(“3”,”three”); What will happen at this line?

5 Answers   Rolta,

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What is the difference between call by reference and call by pointer?

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What is the synonym of string?

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Why is multiple inheritance not supported in java?

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Why java does not support pointers?

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What are the observer and observable classes?

1 Answers  

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If I will write String s=new String("XYZ"); String s1=new String("XYZ"); if(s.equals(s1)){ sop("True"); } else{ sop("False"); } This program will give me "True". But When I am creating my own class suppose class Employee{ public Employee(String name); } Employee e= new Employee("XYZ"); Employee e1 = neew Employee("XYZ"); if(e.equals(e1)){ sop("True"); } else{ sop("False"); } Then it will give the output as "False". Can I know what is happening internally?

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List the features of java programming language.

0 Answers  

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