How to Instantiate an Object in Java

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In Brief...

In Java programming, instantiating an object means to create an instance of a class. To instantiate an object in Java, follow these seven steps.

Instructions

  1. Open your text editor and create a new file. Type in the following Java statements:
    Java Source for Instantiate

  2. The object you have instantiated is referred to as person.

  3. Save your file as InstantiateAnObjectInJava.java.

  4. Create another new file in the same directory. Type in the following Java statements:
    Java Source for Person
  5. The Person class serves as the template for the object your program will create at runtime.

  6. Save your file as Person.java.

  7. Open a command prompt and navigate to the directory containing your new Java programs. Then type in the command to compile the Person class and hit Enter.
    Compile Person Class

  8. Type in the command to compile your Java application and hit Enter.
    Compile Instantiate An Person

  9. You are ready to test your Java program. Type in the command to run the Java runtime launcher and hit Enter. Notice the output of the program that displays the fullName value of your object.
    Run Program with Instantiate

Author: Stephen Withrow

Stephen has over 30 years' experience in training, development, and consulting in a variety of technology areas including Java, C, C++, XML, JavaScript, AJAX, Tomcat, JBoss, Oracle, and DB2. His background includes design and implementation of business solutions on client/server, Web, and enterprise platforms. Stephen is a published writer in both technical and non-technical endeavors. Stephen received an undergraduate degree in Computer Science and Physics from Florida State University.

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