[9] Review Request: 8034068 Label.toString performance improvement

[Sergey Bylokhov]

Hello.
Please review the quick fix for jdk 9.
The code in Label was changed to be a faster and a readable. + small 
cleanup in Component.

Actual change is from:
        String str = ",align=";
        switch(alignment) {
          case 0: str = (new 
StringBuilder()).append(s).append("left").toString(); break;
          case 1: str = (new 
StringBuilder()).append(s).append("center").toString(); break;
          case 2: str = (new 
StringBuilder()).append(s).append("right").toString(); break;
        }
        return (new 
StringBuilder()).append(super.paramString()).append(str).append(",text=").append(text).toString(); 

to
        String str = "";
        switch(alignment) {
          case 0: str = "left"; break;
          case 1: str = "center"; break;
          case 2: str = "right"; break;
        }
        return (new 
StringBuilder()).append(super.paramString()).append(",align=").append(str).append(",text=").append(text).toString();


Bug: https://bugs.openjdk.java.net/browse/JDK-8034068
Webrev can be found at: http://cr.openjdk.java.net/~serb/8034068/webrev.00

--
Best regards, Sergey.