Search results
Dec 10, 2008 · StringBuilder and StringBuffer are almost the same. The difference is that StringBuffer is synchronized and StringBuilder is not. Although, StringBuilder is faster than StringBuffer, the difference in performance is very little. StringBuilder is a SUN's replacement of StringBuffer. It just avoids synchronization from all the public methods.
Feb 3, 2010 · 1. System.out.println(sb1 == sb2); StringBuffer's equals method returns true only when a StringBuffer object is compared with itself. It returns false when compared with any other StringBuffer, even if the two contain the same characters. This is because "==" checks the reference equality and since both sb1 and sb2 are different object ...
Nov 17, 2014 · Scanner sc = new Scanner(System.in); StringBuffer d=new StringBuffer(); d.insert(0,sc.next()); d.append(sc.next()); A stringbuffer is like a String, but can be modified. At any point in time it contains some particular sequence of characters, but the length and content of the sequence can be changed through certain method calls.
StringBuffer sb = new StringBuffer(); for (int i = 0; i < 10; i++) { sb.append(i); } Actually for the example above you should use StringBuilder (introduced in Java 1.5) instead of StringBuffer - StringBuffer is little heavier as all its methods are synchronized.
Jun 4, 2010 · Thread-Safety Difference: The difference between StringBuffer and StringBuilder is that StringBuffer is threadsafe. So when the application needs to be run only in a single thread, then it is better to use StringBuilder. StringBuilder is more efficient than StringBuffer. Situations: If your string is not going to change use a String class ...
Mar 13, 2010 · The differences are. Only in String class + operator is overloaded. We can concat two String object using + operator, but in the case of StringBuffer we can't. String class is overriding toString (), equals (), hashCode () of Object class, but StringBuffer only overrides toString (). String s1 = new String("abc");
Sep 30, 2008 · 8. I'm using StringBuffer in Java to concat strings together, like so: StringBuffer str = new StringBuffer(); str.append("string value"); I would like to know if there's a method (although I didn't find anything from a quick glance at the documentation) or some other way to add "padding". Let me explain; every time I append something to the ...
Mar 26, 2011 · The thing about "StringBuffer is faster than concatenation" refers to repeated concatenation. In that case explicitly creating yoir own StringBuffer and using it repeatedly performs better than letting the compiler create many of them. StringBuilder was introduced in Java 5 for performance reasons, as you say.
2. I think your only problem is that you're trying to parse the contents of the aaa StringBuffer. The aaa StringBuffer still contains the encrypted contents. You're passing the bbb buffer to the decrypt method, so that is the buffer you should attempt to parse into an int: int b = Integer.parseInt(bbb.toString()); answered Dec 15, 2014 at 17:24.
Jan 16, 2018 · StringBuffer is slower than StringBuilder by create new instance in loop setLength(0) of StringBuffer is extremely slower than create new instance in loop. Very simple benchmark (I just manually changed the code and do different test ):
