How are constants defined in Java?

1 year ago
Jackson Davis
1 minute

In Java, constants can be defined using the keyword final. The syntax for defining constants is as follows:

final 数据类型 常量名 = 值;

“I have to study hard in order to pass the exam.”
“I need to study diligently to succeed in the exam.”

final int MAX_VALUE = 100;
final double PI = 3.1415926;
final String MESSAGE = "Hello, World!";

Please be mindful of the following points:

  1. Constant names are usually written in all capital letters, with words separated by underscores, to distinguish them from variables.
  2. Once a constant is assigned a value, that value cannot be changed, meaning the value of the constant is immutable.
  3. Constants must be initialized at the time of declaration, otherwise it will result in a compilation error.
  4. Constants can be defined anywhere within a class, but they are typically defined at the top of the class for easier organization.
bannerAds