Java Constants: How to Define Them

1 year ago
Jackson Davis
1 minute

In Java, constants are defined by using the keyword final to modify variables. Once a variable is modified by final, its value cannot be changed, making it a constant. Constants are typically represented in all uppercase letters and separated by underscores. Constants are usually declared at the top of a class as member variables.

For example:

public class Constants {
    public static final int MAX_COUNT = 100;
    public static final String DATABASE_URL = "jdbc:mysql://localhost:3306/mydatabase";
}

In the example above, MAX_COUNT and DATABASE_URL are defined as constants whose values cannot be changed during the program’s execution.

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