String Methods

AP Computer Science A· difficulty 3/5

public static String go() {
    String s = "abcdef";
    s = s.substring(1, 4) + s.charAt(5);
    return s.toUpperCase();
}
// Call: System.out.println(go());

What is printed?

A
$BCDE$
B
$BCDEF$
C
$BCDF$
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D
$ABCF$

Explanation

substring(1,4) = "bcd". charAt(5) = 'f'. Concatenation -> "bcdf". toUpperCase -> "BCDF".

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