We can pass objects as method arguments in Java

Question

BlackTom AI · Accepted Answer

Objects in Java are passed as references by value: when you pass an object to a method you pass a copy of the reference to that object, not the object itself and not a direct alias to the caller’s variable.

Relevant knowledge points and concepts
- Java parameter passing is always pass-by-value. For primitives, the actual value is copied. For objects, the value copied is the reference (pointer) to the object.
- The method receives its own copy of the reference. Both caller and callee references point to the same heap object initially.
- Because both references target the same object, the method can mutate the object's state (fields). Reassigning the parameter to a new object inside the method does not change the caller’s reference.

Step-by-step reasoning with an example
1. Create object: MyObj a = new MyObj(); a.field = 1;
2. Call method: modify(a);
   - At call time, the value of reference a (say address 0x100) is copied into the parameter variable inside modify (param = 0x100).
3. Inside method: param.field = 2;
   - Both a and param point to same object at 0x100, so the mutation is visible to the caller; a.field becomes 2.
4. If method does param = new MyObj(); param.field = 3;
   - This reassigns only the local copy param; a in caller still references original object. Caller does not see param reassignment.

Why the correct answer is correct
- You can indeed pass objects as method arguments in Java; the method can modify the object's internal state and those changes are observable by the caller because the reference (pointer) to the same object was passed (by value).

Why "False" is incorrect
- Saying “False” would deny that objects can be passed as arguments, which is wrong: object references are passed and used routinely. The confusion usually arises from misunderstanding pass-by-value vs pass-by-reference.

Conclusion
This confirms the correct answer is True.

We can pass objects as method arguments in JavaTrue/False

Similar Questions

Select the correct output. class Person { String name; int age; public static void main(String[] args) { Person p = new Person(); p.name = "Trina"; updatePerson(p); System.out.printf("%s, %d", p.name, p.age); } private static void updatePerson(Person p){ p = new Person(); p.age = 1; } }

Select the correct method that can overload the following method. public int addKey(String s, int i);

The result of dividing by 0 in Java is a ___________ ?

30. What is the main purpose of the lecture?

Question 29 and 30. Choose A, B or C as the best answer. 29. Which statement is the speaker most likely to agree with?

Question 28. Complete the following sentences with ONE WORD/NO MORE THAN TWO WORDS OR A NUMBER from the lecture. 28. Workers’ groups in the Basque region of Spain share Answer Question 22[input] of their corporation.

Question 27. Complete the following sentences with ONE WORD/NO MORE THAN TWO WORDS OR A NUMBER from the lecture. 27. In Bhutan, the government considers Answer Question 21[input] to be more important than economic growth.

Question 26. Complete the following sentences with ONE WORD/NO MORE THAN TWO WORDS OR A NUMBER from the lecture. 26. Degrowth aims to promote mental health by encouraging people to do less Answer Question 20[input] every week.

More Practical Tools for Students Powered by AI Study Helper

Homework AI Solver

Stylized AI Paper Writer

Plagiarism Checker Assistant

Citation AI Academic Writing Tool

In-Class Translation Assistant

AI Note Generator

AI Quiz Answers

Past Exam Questions from University Test Bank

Smart Practice Assistant

Adaptive Practice

Making Your Study Simpler