狂神说Java
面向对象14：static关键字详解
package oop.demo07;
//static
public class Student {
private static int age;//静态的变量
private double score;//非静态的变量
public static void main(String[] args) {
Student s1 = new Student();
System.out.println(Student.age);
System.out.println(s1.age);
System.out.println(s1.score);
}
}
package oop.demo07;
public class Person {
//2
{
//代码块 （匿名代码块）
System.out.println("匿名代码块");
}
//1
static {
//静态代码块
System.out.println("静态代码块");
}
//3
public Person(){
System.out.println("构造方法");
}
public static void main(String[] args) {
Person person = new Person();
}
}
package oop.demo07;
public class Person {
//2：赋初始值~
{
//代码块 （匿名代码块）
System.out.println("匿名代码块");
}
//1 : 只执行一次
static {
//静态代码块
System.out.println("静态代码块");
}
//3
public Person(){
System.out.println("构造方法");
}
public static void main(String[] args) {
Person person1 = new Person();
System.out.println("====================");
Person person2 = new Person();
}
}
