Find index of a string array

Your code should be

String[] line = str.split("\\s+");
String name = str.substring(str.lastIndexOf(line[5]));

because str.lastindexOf(line[5]) returns 0 and then the substring returns the whole String.

In your case you just need to change str.indexOf -> str.lastIndexOf.

This is one easy solution :

String str = "sces123 4096 May 27 16:22 sces123 abc";
//split spaces
String[] line = str.split(" ");
//get 2 last columns
String name = (line[5] + " " + line[6]);
System.out.println(name);

As Glorfindel said in the comment sces123 which is the content of if line[5] also contain as the first substring in the main String str. That why you are getting the full string.

Whats really happening here is:

indexOf( line[ 5 ]) --> returning 0
str.substring(0) -->  returning substring form 0 to last which is the main string

If you are only doing the hard codded things then i don't see the purpose of you here.

But What you want you get in this way (if it serve your purpose ) :

String name = str.substring( str.indexOf( line[ 5 ]+" "+line[6] ) );

Try This:

        String str = "sces123 4096 May 27 16:22 sces123 abc";
        String[] line = str.split("\\s+");

        System.out.println(str.substring(str.lastIndexOf(line[5])));

You could use a Matcher to find the end of the 5th match:

String str = "sces123 4096 May 27 16:22 sces123 abc";
Pattern p = Pattern.compile("\\s+");
Matcher m = p.matcher(str);

for (int i = 0; i < 5; i++) {
    m.find();
}

String name = str.substring(m.end());

In my opinion this is better than using lastIndexOf on to concatenating elements at indices 5 and 6, for the following reasons:

• It does not require line[5] to be the last occurence of that string.

  Using lastIndexOf doesn't work for input

  "sces123 4096 May 27 16:22 sces123 sces123"
  

• It also works for seperator strings of arbirtrary length.

  Using line[ 5 ]+" "+line[6] doesn't work for input

  "sces123 4096 May 27 16:22 sces123             abc"
  

• It does not require the number elements after the split to be 7.

  Using line[ 5 ]+" "+line[6] doesn't work for input

  "sces123 4096 May 27 16:22 sces123 abc def"