Based on the compareTo method for Circle objects defined in Section 6.1, what is

Question

Based on the compareTo method for Circle objects defined in Section 6.1, what is the output of the following code sequence?
Circle c1 = new Circle(5); Circle c2 = new Circle(5);
Circle c3 = new Circle(15);
System.out.println(c1.compareTo(c1)); System.out.println(c1.compareTo(c2));
System.out.println(c2.compareTo(c3));
System.out.println(c3.compareTo(c2));
Based on the compareTo method for Circle objects defined in Section 6.1, what is the output of the following code sequence?
Circle c1 = new Circle(5); Circle c2 = new Circle(5);
Circle c3 = new Circle(15);
System.out.println(c1.compareTo(c1)); System.out.println(c1.compareTo(c2));
System.out.println(c2.compareTo(c3));
System.out.println(c3.compareTo(c2));

Circle c1 = new Circle(5); Circle c2 = new Circle(5);
Circle c3 = new Circle(15);
System.out.println(c1.compareTo(c1)); System.out.println(c1.compareTo(c2));
System.out.println(c2.compareTo(c3));
System.out.println(c3.compareTo(c2));

Explanation / Answer

output is:

method compareTo() is useful to compare two character objects. This method uses internally compareTo() method of interface Comparable. This is possible as Character class implements Comparable interface.

Circle c1 = new Circle(5); // c1 =5

Circle c2 = new Circle(5); //c2= 5

Circle c3 = new Circle(15); //c3 = 15

System.out.println(c1.compareTo(c1));//c1-c1 = 5-5 =0

System.out.println(c1.compareTo(c2));//c2-c2 = 5-5 =0

System.out.println(c2.compareTo(c3));//c3-c2 = 15-5 = 10

System.out.println(c3.compareTo(c2));//c2-c3 = 5-15 =-10

so output is:

0

0

10

-10

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