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.
Add a comment
|
2 Answers
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
Comments
My recommendation would be to use org.apache.commons.lang.StringUtils:
org.apache.commons.lang.StringUtils.join(a, " ");
3 Comments
VaidAbhishek
Can you please explain how can I import this in a project in Netbeans.
MalaKa
Not reinventing the wheel. So I would also suggest this method.
ThomasW
The org.apache.commons link is dead.