How Do I Create a complete String from ArrayList

Question

I want to create a String from an ArrayList. Currently, I am only able to return the last value from the ArrayList. My code:

eachstep = new ArrayList<String>();
for (int i = 0; i < parsedsteps.size(); i++) {
eachstep.add(parsedsteps.get(i).replaceAll("<[^>]*>", ""));
}                   
for (int i = 0; i < eachstep.size(); i++) {
    String directions = i + "."+" "+eachstep.get(i)+"\n"+;
}

Gives me:

3.  This is step 3.

Instead of:

1. This is step 1.          
2. This is step 2.
3. This is step 3.

How do I make my for loop create a String with all the values from the ArrayList?

Khantahr · Accepted Answer · 2012-10-20 18:36:14Z

2

You'll need to declare your string outside of the loop, and I suggest using StringBuilder as well, it's more efficient for building strings like this.

StringBuilder directions = new StringBuilder();
for( int i = 0; i < eachstep.size(); i++ )
{
    directions.append( i + "." + " " + eachstep.get( i ) + "\n" );
}

Then when you want to get the string out of the StringBuilder, just call directions.toString().

answered Oct 20, 2012 at 18:36

Khantahr

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Comments

Wenhui · Accepted Answer · 2012-10-20 18:40:56Z

0

try this

   eachstep = new ArrayList<String>();
   for (int i = 0; i < parsedsteps.size(); i++) {
       eachstep.add(parsedsteps.get(i).replaceAll("<[^>]*>", ""));
   }
   String directions="";
   for (int i = 0; i < eachstep.size(); i++) {
       directions += i + "."+" "+eachstep.get(i)+"\n"+;
   }

If you have large size of string array, you might want to consider using StringBuilder, e.g

  StringBuilder builder = new StringBuilder();
  for(String str: eachstep ){
       builder.append(i).append(".").append(str).append("\n");
  }
  String direction = builder.toString();

answered Oct 20, 2012 at 18:40

Wenhui

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Comments

Rob · Accepted Answer · 2012-10-20 18:54:48Z

0

String directions = "";
for (int i = 0; i < eachstep.size(); i++) {
    directions += i + "."+" "+eachstep.get(i)+"\n";
}

edited Oct 20, 2012 at 18:54

Rob

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answered Oct 20, 2012 at 18:35

Tamir Scherzer

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2 Comments

Tamir Scherzer Over a year ago

sorry, without the + at the end

Tobrun Over a year ago

Stringbuilder would be better

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