5、函数式编程与声明式编程的特性解析

函数式编程与声明式编程的特性解析

1. 代码示例引入

首先，我们来看一段 Java 代码示例，定义了 Student 类和 DemoStreamAPI 类：

public class Student {
    private String name;
    private int rollNo;
    private int total_marks;

    public Student() {
        this.name = "no name";
        this.rollNo = 0;
        this.total_marks = 0;
    }

    public Student(String name, int rollNo, int total_marks) {
        this.name = name;
        this.rollNo = rollNo;
        this.total_marks = total_marks;
    }

    @Override
    public String toString() {
        return name + "\t" + rollNo + "\t" + total_marks;
    }
    //getter and setter
}

public class DemoStreamAPI {
    public static void main(String[] args) {
        List<Student> st