current community

your communities

more stack exchange communities

Stack Exchange
tour help
stack overflow careers
Take the 2-minute tour ×
Stack Overflow is a question and answer site for professional and enthusiast programmers. It's 100% free.
up vote 3 down vote favorite

how can i extract all the elements in a string [] or arraylist and combine all the words with proper formating(with a single space) between them and store in a array..

String[] a = {"Java", "is", "cool"};

Output: Java is cool.

share|improve this question

2 Answers 2

up vote 12 down vote accepted

Use a StringBuilder.

String[] strings = {"Java", "is", "cool"};
StringBuilder builder = new StringBuilder();

for (String string : strings) {
    if (builder.length() > 0) {
        builder.append(" ");
    }
    builder.append(string);
}

String string = builder.toString();
System.out.println(string); // Java is cool

Or use Apache Commons Lang StringUtils#join().

String[] strings = {"Java", "is", "cool"};
String string = StringUtils.join(strings, ' ');
System.out.println(string); // Java is cool

Or use Java8's Arrays#stream().

String[] strings = {"Java", "is", "cool"};
String string = Arrays.stream(strings).collect(Collectors.joining(" "));
System.out.println(string); // Java is cool
share|improve this answer
    
is there a easy way out because i m not that advance in java.. –  user647207 May 8 '11 at 3:35
up vote 4 down vote

My recommendation would be to use org.apache.commons.lang.StringUtils:

org.apache.commons.lang.StringUtils.join(a, " ");
share|improve this answer
    
Can you please explain how can I import this in a project in Netbeans. –  VaidAbhishek Jun 1 '13 at 19:12
    
Not reinventing the wheel. So I would also suggest this method. –  MalaKa May 28 at 10:58

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.