How to Declare Variables in Java

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To reference a variable in a Java program, you must first declare it. To declare a variable, follow these four steps.

  1. Open your text editor and create a new file. Type in the following Java statements:Java Source for Declare VariablesTwo variables are declared. The first variable is of type int. A value is established in a separate Java statement. The second variable is of type String and is declared with an initial value.
  2. Save your file as DeclareVariablesInJava.java.
  3. Open a command prompt and navigate to the directory containing your new Java program. Then type in the command to compile your program and hit Enter.Compile Program with Variable Declarations
  4. Now run your Java program. Type in the command to run the Java runtime launcher and hit Enter. Notice the value of your variables in the program's output.Run Program with Variable Declarations

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