Explanations “Top Java Quiz Questions”

What is the output of the following code?

import rope.*;
import static rope.Rope.*;
public class RopeSwing {
 private static Rope rope1 = new Rope();
 private static Rope rope2 = new Rope();
 {
 System.out.println(rope1.length);
 }
 public static void main(String[] args) {
 rope1.length = 2;
 rope2.length = 8;
 System.out.println(rope1.length);
 }
}
package rope;
public class Rope {
 public static int length = 0;
}

❌ A. 02
❌ B. 08
❌ C. 2
✅ D. 8
❌ E. The code does not compile.
❌ F. An exception is thrown.

Explanation:
There are two details to notice in this code. First, note that RopeSwing has an instance initializer and not a static initializer. Since RopeSwing is never constructed, the instance initializer does not run. The other detail is that length is static. Changes from one object update this common static variable.

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388 viewsApr 19, 2021 at 11:45

What is the output of the following code?

import rope.*;
import static rope.Rope.*;
public class RopeSwing {
 private static Rope rope1 = new Rope();
 private static Rope rope2 = new Rope();
 {
 System.out.println(rope1.length);
 }
 public static void main(String[] args) {
 rope1.length = 2;
 rope2.length = 8;
 System.out.println(rope1.length);
 }
}
package rope;
public class Rope {
 public static int length = 0;
}

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