It's a very well known fact, that one should not use StringBuffers.
StringBuffers have a huge overhead for synchronization purposes that are not needed here.
You should replace those with StringBuilders and even consider not using them at all.
If there are no loops, a simple String a = "Hello, "+ b+ "world!" internally uses a StringBuilder by itself without you worrying about it in the first place...
It's a very well known fact, that one should not use StringBuffers.
StringBuffers have a huge overhead for synchronization purposes that are not needed here.
You should replace those with StringBuilders and even consider not using them at all.
If there are no loops, a simple String a = "Hello, "+ b+ "world!" internally uses a StringBuilder by itself without you worrying about it in the first place...