Explanations “Top Java Quiz Questions”

What is the output of the following program?

public class WaterBottle {
 private String brand;
 private boolean empty;
 public static void main(String[] args) {
  WaterBottle wb = new WaterBottle();
  System.out.print("Empty = " + wb.empty);
  System.out.print(", Brand = " + wb.brand);
} }

❌ A. Line 6 generates a compiler error.
❌ B. Line 7 generates a compiler error.
❌ C. There is no output.
✅ D. Empty = false, Brand = null
❌ E. Empty = false, Brand =
❌ F. Empty = null, Brand = null

Explanation:
Boolean fields initialize to false and references initialize to null, so empty is false
and brand is null. Brand = null is output.

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282 viewsedited  Dec 22, 2020 at 13:53

What is the output of the following program?

public class WaterBottle {
 private String brand;
 private boolean empty;
 public static void main(String[] args) {
  WaterBottle wb = new WaterBottle();
  System.out.print("Empty = " + wb.empty);
  System.out.print(", Brand = " + wb.brand);
} }

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