静态static的内存图
private String name; private int age; static String room; public Student() { } public Student(String name, int age) { this.name = name; this.age = age; } public String getName() { return name; } public void setName(String name) { this.name = name; } public int getAge() { return age; } public void setAge(int age) { this.age = age; } public static String getRoom() { return room; } public static void setRoom(String room) { Student.room = room; }
public static void main(String[] args) { Student.room = "101教室"; Student one = new Student("张三",20); System.out.println("one的姓名:"+one.getName()); System.out.println("one的年龄:"+one.getAge()); System.out.println("one的教室:"+Student.room); System.out.println("================"); Student two = new Student("李四",22); System.out.println("two的姓名:"+two.getName()); System.out.println("two的年龄:"+two.getAge()); System.out.println("two的教室:"+Student.room); }
注意: 根据类名称访问静态成员变量的时候,全程和对象就没关系,只和类有关系。