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About Byron Kiourtzoglou

Byron is a master software engineer working in the IT and Telecom domains. He is an applications developer in a wide variety of applications/services. He is currently acting as the team leader and technical architect for a proprietary service creation and integration platform for both the IT and Telecom industries in addition to a in-house big data real-time analytics solution. He is always fascinated by SOA, middleware services and mobile development. Byron is co-founder and Executive Editor at Java Code Geeks.

Passing an object to a method example

With this example we are going to demonstrate how to pass an object to a method. In short, we have created a class and a method to pass the object of the class:

  • We have created a class, Character with a char field.
  • We have created another class, PassObject, that has a static method, void setCh(Character y). The method gets a Character object and changes its char field to 'z'.
  • We create a new instance of Character class and set its char field to 'a'.
  • Then we use the setCh(Character y) method of PassObject class to change again the field of Character object.
  • In both ways the field of Character object is changed.

Let’s take a look at the code snippet that follows:  

package com.javacodegeeks.snippets.core;


class Character {
    
    char ch;
}

public class PassObject {

    static void setCh(Character y) {

  y.ch = 'z';
    }

    public static void main(String[] args) {

  Character x = new Character();

  x.ch = 'a';

  System.out.println("1: x.ch: " + x.ch);

  setCh(x);

  System.out.println("2: x.ch: " + x.ch);
    }
}

Output:

1: x.ch: a
2: x.ch: z

  
This was an example of how to pass an object to a method in Java.

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