StringBuffer Trim Java Example

/*
StringBuffer Trim Java Example
This example shows how to trim StringBuffer object in Java using substring method.
*/
public class JavaStringBufferTrimExample {
public static void main(String[] args) {
//create StringBuffer object
StringBuffer sbf = new StringBuffer(" Hello World ! ");
/*
* Method 1: convert StringBuffer to string and use trim method of
* String.
*/
String str = sbf.toString().trim();
System.out.println("StringBuffer trim: \"" + str +"\"");
/*
* Method 2: Create method to trim contents of StringBuffer
* using substring method.
*/
System.out.println("\"" + trim(sbf) + "\"");
}
private static String trim(StringBuffer sbf){
int start, end;
//find the first character which is not space
for(start = 0; start < sbf.length(); start++){
if(sbf.charAt(start) != ' ')
break;
}
//find the last character which is not space
for(end = sbf.length(); end > start ; end--){
if(sbf.charAt(end-1) != ' ')
break;
}
return sbf.substring(start, end);
}
}
/*
Output of above given StringBuffer trim example would be
StringBuffer trim: Hello World !
Hello World
*/