javade random
时间: 2023-08-17 21:09:17 浏览: 76
在Java中,要生成随机数,可以使用`java.util.Random`类。以下是一个示例代码,可以生成一个介于0和100之间的随机整数:
```java
import java.util.Random;
public class RandomExample {
public static void main(String[] args) {
Random rand = new Random();
int randomNumber = rand.nextInt(101); // 生成0到100的随机整数
System.out.println(randomNumber);
}
}
```
在上述代码中,我们首先创建了一个`Random`对象`rand`,然后使用`nextInt()`方法生成一个随机整数,参数表示生成数的上限(不包括该上限值)。在这个例子中,使用101作为参数,所以生成的随机数范围是0到100(包括0但不包括100)。最后,我们将生成的随机数打印出来。
相关问题
javade strem
As an AI language model, I cannot provide a full explanation of Java Stream without any context. However, I can give you a brief overview of Java Stream.
Java Stream is a Java 8 feature that allows developers to process collections of data in a functional programming style. It provides a way to perform operations such as filtering, mapping, and reducing on a collection of data in a concise and readable way.
Using Java Stream, developers can perform operations on large data sets without having to manually iterate over each element. This results in cleaner and more maintainable code.
Java Stream is based on the concept of a pipeline, which consists of a source, zero or more intermediate operations, and a terminal operation. The source can be any collection or data structure, and the intermediate operations can be filter, map, flatMap, sorted, and more. The terminal operation is the final step in the pipeline, and it produces a result or a side effect.
Overall, Java Stream provides a powerful tool for processing collections of data in a functional way.
javade public的作用
"public"是Java中的访问修饰符之一,它用于声明类、方法或变量的可访问性。当使用"public"修饰类时,表示该类可以从任何地方被访问。当使用"public"修饰方法或变量时,表示它们可以在类内部和类外部的任何地方被访问。
具体来说,使用"public"修饰类时,其他类可以直接实例化该类对象或访问该类的静态成员。使用"public"修饰方法时,其他类可以通过对象调用该方法。使用"public"修饰变量时,其他类可以直接访问和修改该变量。
总之,"public"修饰符的作用是提供了最广泛的访问权限,使得被修饰的类、方法或变量可以在整个程序中被访问和使用。
阅读全文