JSP - Declaration Tag
JSP Declaration
JSP के declaration tag में variables, methods और classes को declare किया जाता है | अगर किसी भी variable, methhod या class को इस्तेमाल करने से पहले उसे declare किया जाता है |
Syntax for JSP Declaration :
<% declaration %>OR
<jsp:declaration> declaration </jsp:declaration>
Example For Variable Declaration
Source Code :
<html>
<head>
<title>Declaration Tag - Variable Declaration</title>
</head>
<body>
<%! int a = 1; %>
<jsp:declaration>
int b = 2;
</jsp:declaration>
<%
out.print("Value of a : " + a + "<br />");
out.print("Value of b : " + b);
%>
</body>
</html>
Output :
Value of a : 1 Value of b : 2
Example for Method Declaration
Source Code :
<html>
<head>
<title>Declaration Tag - Method Declaration</title>
</head>
<body>
<%!
String ConcatStr(String str1, String str2){
return str1 + str2;
}
%>
<% out.print(ConcatStr("Hello", " World")); %>
</body>
</html>
Output :
Hello World
Example for Class Declaration
Source Code :
<html>
<head>
<title>Declaration Tag - Class Declaration</title>
</head>
<body>
<%!
public class MyClass{
public String myMethod(){
return "Hello World";
}
}
%>
<%
MyClass c = new MyClass();
out.print(c.myMethod());
%>
</body>
</html>
Output :
Hello World