How Do I read Names in A text File In A reverse Order

[Stanley Mungai]

HI guys, I have a text File that Contain Names Starting with the surname and then the First Name. I would Like to read them In a reverse order Starting with the First Name and the Second name. The code I have reads them in the order which they are printed on the text file. For Example

I have the Name:
Mungai Stanley

I want the output to be:
Stanley Mungai

The code I have is:

FileInputStream fs1 = new FileInputStream("D:/ABC Statements/" + filenames[i]);
            BufferedReader br1 = new BufferedReader(new InputStreamReader(fs1));
           for (int j = 0; j < 1; ++j) {
                br1.readLine();
            }
            String name = br1.readLine().trim();
           
            System.out.println(name);
            br1.close();

[Maneesh Godbole]

Read the line.
Split the read values
Use as required.

[Stanley Mungai]

Thank you Maneesh For that Quick Reply. I must say That Am very new to Java and I do not Know what to "Split the Read Values Mean".

[Maneesh Godbole]

1) When you execute

String name = br1.readLine().trim();  

the name parameter contains the line text, e.g.Mungai Stanley

2) Look at the Java API to find method(s) in the String class which will split (hint) a given string and return you a String array

3) Once you have the elements in the array i.e. Mungai and Stanley, you can always refer to them by the index and use as you require it.

[Stanley Mungai]

Ok Thank you. I will look at that. It is the Re arranging bit that Am not sure what to do with it.

[Maneesh Godbole]

Its not quite difficult as it might sound.
As you already know, array elements can be accessed using the index like
obj[0], obj[1]....,obj[n]
So when you split the read line you get the last name and first name. Just access it as first name(index) and last name(index)

[Stanley Mungai]

OK I will try. I was just Hoping an example would help. Thank you.

[Maneesh Godbole]

Here you go http://docs.oracle.com/javase/tutorial/java/nutsandbolts/arrays.html

[Stanley Mungai]

Ok Here I what I now Have But I am Getting an error.

  FileInputStream fs1 = new FileInputStream("D:/ABC Statements/" + filenames[i]);  
                BufferedReader br1 = new BufferedReader(new InputStreamReader(fs1));  
               for (int j = 0; j < 1; ++j) {  
                    br1.readLine();  
                }  
                String name = br1.readLine().trim();  
                 String words[] = name.split(" ");
        for(int i = words.length; -1 < i; i--){
            System.out.println(words[i] + " ");
        }
                
                br1.close();  

I am Getting An error

Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 2
	at split.example.SplitExample.main(SplitExample.java:32)
Java Result: 1

Please Someone help me out.

[Joanne Neal]

An array is indexed from 0 to length - 1. Your loop starts at length.

[Campbell Ritchie]

The continuation condition for your for loop looks incorrect.

[edit]I was mistaken, because you are iterating backwards. Joanne was correct. Sorry. You should write
for (int i = myArray.length - 1; i >= 0; i--) ...
[/edit]

[Stanley Mungai]

When I get a Solution, I always Like to post it for guys like me who might have the Same Problem. Here Is the Code guys:

 FileInputStream fs1 = new FileInputStream("D:/ABC Statements/" + filenames[i]);    
                BufferedReader br1 = new BufferedReader(new InputStreamReader(fs1));    
               for (int j = 0; j < 1; ++j) {    
                    br1.readLine();    
                }    
                String name = br1.readLine().trim();    
                String[] str =name.split(" ");
	    StringBuffer buffer = new StringBuffer();
	    for(int v=str.length-1;v>=0;v--)
	    {
	        buffer.append(str[v]);
	        buffer.append(" ");
	    }
            String mine = buffer.toString();
	    
	    System.out.println(mine);
        }  
                  
                br1.close();    

If the Input is: Surname Firstname
Output is : Firstname Surname
Thanks to everyone Who helped Me to think Along!!!