Hash code printed in place of array elements [duplicate]

Answer 1

This is because you are putting a student object into the array:

Student student[] = new Student[5];
newStudent.getName();
student[i] = newStudent;

strList.add(newStudent);
System.out.println(student[i]);

Here when you are printing, you are not printing the students name, but rather the object itself. Whenever you do a System.out.println on an object the hashcode is returned.

Was this your problem?

Answer 2

please override toString() method as currently it is only printing by default implementation of toString() method from Object class which is set to current object's hashcode().

Answer 3

1. If you want a String representation of an object, this object must implement toString(). If you don't the default in the JVM is to print the hash code.
2. If you want to print a specific field of your object, you should explicitly print that field, through a method if necessary; like System.out.println(student[i].getName());
3. If you are trying to print a whole array, you should use Arrays.toString().

Answer 4

This kind of printing will get the instance address and not a print of it.

Because you want to print a reference type, the VM doesn't know how you want it display or whatever or not some of the fields aren't for printing.

It's apt to you, Overriding "public String toString()" method and implement your own format.