StringBuilder

[SAN THO]

Hi Team,

  I found a code snippet as below:

<----------------code snippet--------------->

Object localObject1="7"+"1"+"5"+"1";

new StringBuilder(String.value("8")).append("1").append("5").append("1").toString();

Object localObject2="9"+"1"+"5"+"1";

Object localObject3="2"+"8"+"5"+"5";

new StringBuilder(String.value("3")).append("8").append("5").append("5").toString();

String str1="7"+"1"+"5"+"5";

String str2="3"+"8"+"5"+"8";

new StringBuilder(String.value("7")).append("0").append("1").append("5").toString();

new StringBuilder(String.value("7")).append("0").append("1").append("9").toString();

<----------------code  snippet--------------->

I was looking at the StringBuilder constructor as it is building string something like "8151", But the confusions here is how does it affect to the snippet, if it does so ? 

Anyone can lighten some points here ?

Thanks

SAN