类和对象说明

类的属性和方法

类的入门案例

//类名
public class school {//属性String name; //名称int	jsNumber; //教室数目int jfNumber;//机房数目//方法public void show(){System.out.println("名称: "+ name + "教室数目" + jsNumber + " , 机房数目：" + jfNumber);}
}

public class Demo01 {public static void main (String[] args){//声明School school;//分配空间school = new School();//点访问属性school.name = "华夏高中";school.jsNumber = 36;school.JFNumber = 8;school.show();}
}

类的入门案例内存图

public class Demo01 {public static void main (String[] args){//声明//School school;School school = new School();//点访问方法school.show(); //名称：null，教室数目：0，机房数目：0//点访问属性school.name = "华夏高中";school.jsNumber = 81;school.JFNumber = 9;school.show();}
}

游客案例

public static void main(Stringl] args)]{Scanner scanner = new Scanner(System.in);while (true) {System.out.print("请输入姓名:");String name = scanner.next(); if (name.equals("n")) break; // 提供了一个退出通道	System.out.print("请输入年龄:");int age = scanner.nextInt();Visitor visitor = new Visitor();// 创建对象visitor.name = name :visitor.age = age;visitor.show();}
System.out.println("退出程序");
}

点访问对象自动提示

修改管理员密码

积分回馈

类的多个对象内存图

栈资源释放

堆资源释放

printf