String Objects: Concatenation, Literals, and More

AP Computer Science A· difficulty 4/5

public static String run() {
    String s = "Programming";
    String t = s.substring(0, 4) + s.substring(7);
    return t.replace('m', 'X');
}
// Call: System.out.println(run());

What is printed?

A
$ProgXmin$
B
$ProgXing$
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C
$ProgXXing$
D
$ProgaXXing$

Explanation

substring(0,4)="Prog". substring(7)="ming". Concat = "Progming". replace 'm'->'X' = "ProgXing".

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