static
package base.Demo05;
import static java.lang.Math.random;//静态导入包
public class Person {
{
//代码块(匿名代码块)
System.out.println("匿名代码块");
}
static {
//静态代码块
System.out.println("静态代码块");
}
public Person() {
System.out.println("构造方法");
}
public static void main(String[] args) {
Person s1 = new Person();
System.out.println(
"========"
);
Person s2 = new Person();
System.out.println(random());
}
}
//代码刚开始创建会先走静态代码块,而且只会调用一次,后面使用匿名代码块,再到构造方法
package base.Demo05;
public class Student {
private static int age;//静态变量
private double score;//非静态变量
public void run(){
}
public static void go(){
}
public static void main(String[] args) {
Student s1 = new Student();
System.out.println(Student.age);
System.out.println(s1.score);
System.out.println(s1.age);
Student.go();
s1.run();
}
}