// DrJava saved history v2
Student a = new Student("Andrew" , "T");
Student b;
/* we are assigning the value in a to b */
/* but b only holds a reference (memory location) to a Student in memory */
b = a;
int c = 5;
int d = 5;
c == d
d == 4
d = 4
c == d
/** does the value in a equal that in b? */
a == b
/* yes - they both refer to the same object */
b = new Student("Andrew" , "T");
/* we just created an identical Student object and assigned it to b */
/* are they equal this time? */
a == b
/* no, because == tests if they hold equivalent references, and */
/* a refers to the location of the first student object we created */
/* and b now refers to the new student object */
String e = "faye";
String f = "faye";
/* what about strings? */
e == f
/* to compare string values, we use the equals(Object o) method */
/* look it up in the API documentation for java.lang.String */
e.equals(f)
Student a = new Student("Andrew" , "T");
Student b = new Student("Andrew" , "T");
a == b
a.equals(b)