Passing values between two classes

[Abbas Haider]

Hi

It is a basic OOP methodology that the members of a class can be passed into other class by making other class sub class of that class using extends keyword.

My question regarding this is I want to assign a value of a variable say
int i of a class say class A into a variable say int j of another class say class B without any using of inheritance.
Is this possible?

class A
{
int i=6;
}

class B
{
int j;
}

The second problem in it is that I have created a method that the value of int i is changing, so I want to pass it in the int j variable and save it in j. So whenever I want to call the saved value I get it. How this is possible?
Thanks in Advance

[TBeck]

use accessor and mutator methods.

an accessor method will retrieve a value, and a mutator method will change the value.

heres a simple class using both of these:

public class ChangingVars
{
  int i;
  public ChangingVars(int input)
  {
    this.i = input;
  }
  //accessor method
  public int getValue()
  {
    return this.i;
  }
  //mutator method
  public void changeValue(int newVal)
  {
    this.i = newVal;
  }
}

and then in another class where you would have something like:

public class UsingChangingVars
{
  public static void main(String[] args)
  {
    //stores the integer 10 in the ChangingVars object var1
    ChangingVars var1 = new ChangingVars(10);
    //stores the integer 17 in the ChangingVars onject var2
    ChangingVars var2 = new ChangingVars(17);
    
    //getting a value out of the object
    int gettingTheValue = var1.getValue();
    //setting the value in the object
    var2.changeValue(gettingTheValue);
    
    //or doing both at once
    var2.changeValue(var1.getValue());
    
  }
}

[System_Error]

Global variables should be private, otherwise there's no need to have accessor and mutator methods because you can access it directly. Make variable i private and you're good to go.

public class ChangingVars
{
  private int i;

[TBeck]

bad habbits are hard to get rid of

[System_Error]

bad habbits are hard to get rid of

Don't worry, I've been there and done that.