Based on the equals method for Circle objects, what is the output for the follow

Question

Based on the equals method for Circle objects, what is the output for the following code sequence? Circle c1 = new Circle(5); Circle c2 = new Circle(5); Ci r cle c3 = new Circle(15); Circle c4nul1 Syst em out. println(cl c1) Syst em out println(c1 c2); Syst em out. pri nt l n(c1 c3) Syst em out . pri nt l n( c 1 == c 4) Syst em out. pri nt l n(c1. equals(c1)): Syst em out. println(c1. equal s (c2)) Syst em out. pri ntl n(c1. equal s (c3)): Syst em out . println(c1. equal s (c4)) public boolean equals (Ci rcl e circle) / / Precondi t 1 on: ci r cl e ' = nul l // Ret urns true if the circles have the same radi us ot herwise, ret urns false if (thi s . radius == circle·radius ret urn true; else ret urn false;

Explanation / Answer

== checks if the references are same.

For,

c1 == c1

It returns true as the reference are same.

For,

c1 == c2

It returns false as the reference are not same.

For,

c1 == c3

It returns false as the reference are not same.

For,

c1 == c4

It returns false as the reference are not same.

For,

c1.equals(c1)

It returns true as the radius are same.

For,

c1.equals(c2)

It returns true as the radius are same.

For,

c1.equals(c3)

It returns false as the radius are same.

For,

c1.equals(c4)

It returns false as c4 is null.

So, Output is

true

false

false

false

true

true

false

false

Related Questions

Navigate

• Browse (All)
• Browse B
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.