Java Class

[debajjio]

Can you any one help me sove this problem?:
I'm creating a class caled Student that will have the following atrributes:
a) Student ID
b) Last Name
c)First Name
d) Program
The class must have the following methods:
a) A constructor that accepts nothing and intializes all attributes to zero (0) and null accordingly.
b)A Constructor that accepts all values.
c) A method called Display that displays all attributes.
d) A method called changeProgram that changes the program of a student.
c) A main method to test the Dispaly method is the Student class

[JosAH]

Sure we can help you. What's the part you're having problems with?

kind regards,

Jos

[debajjio]

Sure we can help you. What's the part you're having problems with?

kind regards,

Jos

Thanks for helping me out....
After creating the classes the above classes...I don't have any idea on how to apply the following methods to them...:
a) A constructor that accepts nothing and intializes all attributes to zero (0) and null accordingly.
b)A Constructor that accepts all values.
I so confused any help will be welcome.

[JosAH]

Thanks for helping me out....
After creating the classes the above classes...I don't have any idea on how to apply the following methods to them...:
a) A constructor that accepts nothing and intializes all attributes to zero (0) and null accordingly.
b)A Constructor that accepts all values.
I so confused any help will be welcome.

Well, simply create the class according to those specs then:

public class Student {
 
   // all members are initialized to null, 0 etc.
   private String ID;
   private String lastName;
   private String firstName;
   private String program;
   // a: so this ctor has got nothing to do:
   public Student() { }
   // b: this ctor sets all members:
   public Student(String ID, String lastName, String firstName, String program) {
      this.ID= ID;
      // same for the other members
   }
   // c: display the String representation of this object
   public void Display() {
      System.out.print(this);
   }
   // d: also according to the requirements:
   public String changeProgram(String program) {
      String oldProgram= this.program;
      this.program= program;
      return oldProgram; // convenience
   }
   public String toString() {
      // return a String representation of this object
   }
}

That's about it; fill in the blanks and voila.

kind regards,

Jos