代码编辑器：
x
1
object Test {2
def main(args: Array[String]) {3
val buf = new StringBuilder;4
buf += 'a'5
buf ++= "bcdef"6
println( "buf is : " + buf.toString );7
}8
}9
object Test { def main(args: Array[String]) { val buf = new StringBuilder; buf += 'a' buf ++= "bcdef" println( "buf is : " + buf.toString ); }}