Given the following declarations:
StringBuilder buf;
StringBuilder buf2 = new StringBuilder();
String c = new String("test");
Which of the following is not a valid StringBuilder constructor?
A) buf = new StringBuilder();
B) buf = new StringBuilder(buf2, 32);
C) buf = new StringBuilder(32);
D) buf = new StringBuilder(c);

Question

Given the following declarations: 
StringBuilder buf;
StringBuilder buf2 = new StringBuilder();
String c = new String("test");
Which of the following is not a valid StringBuilder constructor?
A) buf = new StringBuilder();
B) buf = new StringBuilder(buf2, 32);
C) buf = new StringBuilder(32);
D) buf = new StringBuilder(c);

Quizplus · Accepted Answer

The StringBuilder constructor with two arguments (StringBuilder and int) does not exist. The other constructors are valid:
A) Creates a new StringBuilder object with no initial characters.
C) Creates a new StringBuilder object with an initial capacity of 32.
D) Creates a new StringBuilder object with the same characters as the String object "test".

Given the Following Declarations