描述Person对象：
package android.java.oop09;
// 描述Person对象
public class Person {
private String name;
private int age;
private double height;
private static String country = "中国";
private Person() {}
public Person(String name, int age, double height) {
this.name = name;
this.age = age;
this.height = height;
}
public void showValue() {
System.out.println("name:" + name + " age:" + age + " height:" + height + " country:" + country);
}
}
main测试方法：
package android.java.oop09;
public class Demo01 {
public static void main(String[] args) {
Person person1 = new Person("李双贱", 30, 17.0);
person1.showValue();
Person person2 = new Person("李双2B", 32, 16.0);
person2.showValue();
Person person3 = new Person("李双SB", 31, 17.0);
person3.showValue();
Person person4 = new Person("李双shit", 33, 16.0);
person4.showValue();
Person person5 = new Person("李双38", 32, 17.0);
person5.showValue();
Person person6 = new Person("李双骗子", 99, 16.0);
person6.showValue();
Person person7 = new Person("李双女骗子", 99, 17.0);
person7.showValue();
Person person8 = new Person("李双骚", 99, 17.0);
person8.showValue();
// ....
}
}
以上案例对应内存图：
1.静态变量随着类的加载而加载，随着类的消失而消失 （必须是共享数据才使用 静态， 静态生命周期很长）
2.非静态变量随着对象的加载二加载，随着对象的消亡而消亡（如果是共享数据，还使用非静态的话，会导致每一个对象都有 此变量 浪费内存空间）