preparing for scjp 5.0

[anita dhar]

import java.util.*;

public class TestSet
{
public static void main(String[] args)
{
Collection<String> set = new TreeSet<String>();
set.add("java");
set.add("xml");
set.add("Swing");
set.add("jsp");
set.add("java");
for(Object o : set)
{
System.out.println(o + " ");
}
}
}


the o/ p of this programe is jsp java xml swing

how this flows

[Paul Napauleon]

Hi,

how did you get that output? When i run that code, the output is as follows:

Swing 
java 
jsp 
xml 

As you can see the output is sorted (capitals before non-capitals) and there are no duplicate elements in the collection.

[anita dhar]

import java.util.*;

public class TestSet
{
public static void main(String[] args)
{
Collection<String> set = new TreeSet<String>();
set.add("Java");
set.add("XML");
set.add("Swing");
set.add("JSP");
set.add("Java");
for(Object o : set)
{
System.out.println(o + " ");
}
}
}

o/p JSP Java Swing XML

[prem arora]

Try doing this....

import java.util.*;


public class TestSet
{
public static void main(String[] args)
{
Collection<String> set = new TreeSet<String>();
set.add("Java");
set.add("JSP");
set.add("_Java");
set.add(" Java");
set.add(" JAVA");
set.add(" java");
set.add("_java");
for(Object o : set)
{
System.out.println(o + " ");
}
}
}

The TreeSet uses the natural sorting order for String, which is "empty space first", the "Capital letters", then lowers, then underscore....

[mo shaik]

    hai aneena,
sorry to tell u that once u are typing caps JSP and in other program you typed small jsp that make the output change  sequence.
The collection u used tree is sorted in natural order so caps come first and so on...
thanks

[Burkhard Hassel]

Howdy Ranchers!

Prem posted

Try doing this....
(...)
The TreeSet uses the natural sorting order for String, which is "empty space first", the "Capital letters", then lowers, then underscore....

Prem, you are new to the Ranch, so


Welcome!!!





I only cite your message, because it seems to be the most important part of this thread.

Now the unimportant part:


Mo posted

code:

Perhaps Mo wanted us to remember, that below the entry window for your contributions, there is a button.
When posting code, use it, otherwise you loose the indentations and the code looks less readable.
But, Mo, you really shouldn't use this button

always

Yours,
Bu.

[sumi selva]

Hi
I executed the following code.
import java.util.*;

public class TestSet
{
public static void main(String[] args)
{
Collection<String> set = new TreeSet<String>();
set.add("Java");
set.add("_Java");
set.add("kava");
set.add(" JAVA");
for(Object o : set)
{
System.out.println(o + " ");
}
}
}

I got the output as

JAVA
Java
_Java
kava

So I think the it is sorted as - empty space,capital letters. underscore then lower letters
Pls tell me if i'm wrong

[prem arora]

Hey Bu,
Thanks, I shall take care about adding code.. :-)

And yes, sumi, you are correct about the order, i mentioned it in-correctly, thanks for rectifying and thank god I didn't face a question on it in the real exam. :-)