Java Call By Reference

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class Student {

	private String studentName;

	public Student(String name) {
		this.studentName = name;
	}

	public String getStudentName() {
		return studentName;
	}

	public void setStudentName(String name) {
		this.studentName = name;
	}
}

public class JavaCallByReference {

	public static void main(String[] args) {
		Student s1 = new Student("John");
		System.out.println("1: " + s1.getStudentName());
		changeReference(s1); // It won't change the reference!
		System.out.println("2: " + s1.getStudentName());
		modifyReference(s1); // It will change the object that the reference
								// variable "John" refers to!
		System.out.println("3: " + s1.getStudentName());
	}

	public static void changeReference(Student s1) {
		Student s2 = new Student("Smith");
		s1 = s2;
	}

	public static void modifyReference(Student s1) {
		s1.setStudentName("Carol");
	}
}
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