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Foreach loop with negative index in velocity

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This Example shows you how to use foreach loop with negative index in velocity.

Foreach loop with negative index in velocity

     

This Example shows you how to use foreach loop with negative index in velocity.

The method used in this example are described below:-
1:- Initialize velocity run time engine through method  init().
2:- Create object of VelocityContext Class.
3:- Create Template class object, Template class object is used for controlling template methods and properties.

template.merge(context, writer): Merge method of the Template class is used here for merging the VelocityContext class object to produce the output. Template  class object is used for controlling template methods and properties.

#foreach( $num in [2..-2] ): This works like for loop but here in this example we have used foreach loop with negative index..

 

 

  NegativeIndex.java:

import java.io.*;

import org.apache.velocity.*;
import org.apache.velocity.app.*;
import org.apache.velocity.tools.generic.RenderTool;

public class UseDollarSign {

  public static void main(String[] argsthrows Exception {
  Velocity.init();
  Template t = Velocity.getTemplate("./src/NegativeIndex.vm");

  VelocityContext context = new VelocityContext();
  
  Writer writer = new StringWriter();
  t.merge(context, writer);

  System.out.println(writer);
  }
}

NegativeIndex.vm:
#foreach( $num in [2..-2] )
    Current Index: $num
#end

Output:
Current Index: 2
Current Index: 1
Current Index: 0
Current Index: -1
Current Index: -2

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Posted on: August 27, 2008

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