JAVA基础学习之路（四）定义简单java类

class Book {
    private String name;
    private int price;
    private int num;
    public Book() {
        
    }
    public Book(String na ,int pri, int n) {
        name = na;
        price = pri;
        num = n;
    }
    public book() {
        
    }
    public void setName(String n) {
        name = n;
    }
    public void setPrice(int p) {
        price = p;
    }
    public void setNum(int n) {
        num = n;
    }
    public String getName() {
        return name;
    }
    public int getPrice() {
        return price;
    }
    public int getNum() {
        return num;
    }
    public  int  getMonney(int price, int num) {
        return price*num;
    }
    public String getinfo() {
        return "书名:"+name+"\n"+
               "单价:"+price+"\n"+
               "数量:"+num+"\n";
    }
}

public class test2 {
    public static void main(String args[]) {
        Book monney = new Book("老人与海",20,3);
        System.out.println(monney.getinfo());
    }
}