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explain the working  RSS feed

 
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public class examp2
{
public static void main(String[] args)
{
String x="Java";
String x2;
x=x.concat("Rules");
for(int i=0;i<x.length();i++)
{
x=x.substring(i);
x2=x;
System.out.println(x2);
}
}
}

works different then the following one

......
.......
for(;
{
x2=x.substring(i);
System.out.println(x2);
}
.....
.....

how the references are assigned please explain
thanks
 
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In the first example, you assign the substring back to x. This makes x shorter each time it loops. Therefore the loop will be executed less times than in the second example. This process goes faster and faster as you take substrings of substrings...

In the second example x is not modified (the substring method itself does not modify the string)and therefore will nicely give you as many substrings as x is long.
 
Soni Mitesh
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I got that, thanks bart
 
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