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| 1. 6. 2. 定义常量值，并使用它 |
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- Using the final keyword to declare a variable.
- The final keyword specifies that the value of a variable is final and cannot be changed.
- It is a convention in Java to write constants in uppercase letters.
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public class MainClass {
public static void main(String[] arg) {
final int FEET_PER_YARD = 3; // Constant values
final double MM_PER_INCH = 25.4; // that cannot be changed
System.out.println(FEET_PER_YARD);
System.out.println(MM_PER_INCH);
}
}
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3
25.4 |
| 1. 6. 常数 | | 1. 6. 1. | 定义常量 | | | | 1. 6. 2. | 定义常量值，并使用它 | | |
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