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StringBuffer sb = new StringBuffer("abc");
StringBuffer sb1 = sb;
StringBuffer sb2 = new StringBuffer("abc");
How many objects are created?
StringBufferobjects are created because there is 2new.Stringobject is created [JLS, 3.10.5 => It is guaranted that the object will be reused by any other code running in the same virtual machine that happens to contain the same string literal]