substring()

[shabbir zakir]

class x {
public static void main(String args[]) {
String s = "hypertext";
String t = s.substring(2,5);
System.out.println(t);
}
}
the result of this code should be "perte".But it displays "per". Please explain the rule for substring(int startindex,int endindex) method.

[Hungson Le]

You should download the Java API.
Quoted:

"public String substring(int beginIndex,
                        int endIndex)
Returns a new string that is a substring of this string. The substring begins at the specified beginIndex and extends to the character at index endIndex - 1. Thus the length of the substring is endIndex-beginIndex. "

Hungson Le

[Glade Wishart]

I believe that the substring functions arguments substring(x, y) are x = the start point of where you would like to retrieve data (starting at "p"). Y = the data to return from the beginning of the complete String (starting at "h" but only returning "per" based on argument x).

[Val Dra]

class x {
public static void main(String args[]) {
String s = "hypertext";
String t = s.substring(2,5);
System.out.println(t);
}
}
this is how it works , substring takes 2 args , first one the starting position 2nd one is the ending postion. What happends is when you say 2 it doesn't include 2nd position it starts including from 3rd so you get a p but it does include the last position so that's your result

[Art Metzer]

Hi, Shabbir.
When it comes to substring's two-argument version, I remember two things:

• Substring, like arrays, starts counting from zero, so if the first argument is "2", substring starts counting at the third character;
  
• The number of characters in the resultant String will be endIndex minus startIndex.
  

Hope this helps,
Art

[Latha Kalaga]

Hi! Shabbir
Here is the API documentation from the sun API pages:
Hope this helps
"substring
public String substring(int beginIndex,
int endIndex)
Returns a new string that is a substring of this string. The substring begins at the specified beginIndex and extends to the character at index endIndex - 1. Thus the length of the substring is endIndex-beginIndex.
Examples:
"hamburger".substring(4, 8) returns "urge"
"smiles".substring(1, 5) returns "mile" "