Understanding Variable Assignments

java

Integer frenchRevolution = 1789;

Object o1 = new String("1789");

Object o2 = frenchRevolution;

frenchRevolution = null;

frenchRevolution is an Integer with value1789.

o1 is aString with value "1789".

o2 storesa reference to frenchRevolution, which is an Integer (1789).

frenchRevolution = null;only nullifies the reference, but o2 still holds the Integer 1789.

Calling toString() on o2

java

Object o3 = o2.toString();

o2 refers to an Integer (1789).

Integer.toString() returns theString representation "1789".

o3 is assigned "1789" (String).

Evaluating o1.equals(o3)

java

System.out.println(o1.equals(o3));

o1.equals(o3) isequivalent to:

java

"1789".equals("1789")

Since both areequal strings, the output is:

arduino

true

Thus, the correct answer is:true

References:

Java SE 21 - Integer.toString()

Java SE 21 - String.equals()