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This article introduces the relevant knowledge of "what is the way of data transmission between classes in java". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

Data transfer between java classes

Although I knew the data transfer between java classes when I first learned java, I may also understand it at that time, but I may have forgotten

As it happens, this is used, and then just to pass one data to the last two classes in succession.

Method, either through the constructor or through the set method.

Constructor function

The code is not easy to demonstrate

1. Class A _ C for the purpose of transferring the data from class A to class C.

2. Now create an instance of class An in B (used as a handle), and then "assign" it in the constructor of B (not initialization). Class A should be used as a parameter in the constructor and write the assignment statement to the first line as far as possible.

3. When class B is to be used in class A, it naturally needs to pass a parameter before it can be constructed. Passing "this" as a parameter at this time is equivalent to assigning an instance of An in class B.

4. Because C is to be used in B, the value is passed from B to C in the same way.

5. When passing a value or assigning a handle, write it to the front as far as possible to ensure that the following statement will not call its value as null.

6. The work is done.

Java class and class pass values to each other

To realize that values are passed between Java classes and classes, first the java file must be under the package folder

Package references;public class A {/ * * @ param args * / public static void main (String [] args) {/ / TODO Auto-generated method stub} public static String getA () {return "getA";}} package references Public class B {/ * * @ param args * / public static void main (String [] args) {/ / TODO Auto-generated method stub references.An a=new references.A (); System.out.println (a.getA ());}}

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