静态初识

package Jing;

public class Person {
String name;
static String history="5000年前是猴纸";


    
    
    
}

package Jing;

public class Shuxue {

public final static double PI=3.14;

public static boolean isPrime(int a){
    for(int i=2;i<=a;i++){
        if(i==a){
            return true;
            
        }
        if(a%i==0){
            return false;
        }
    }
    return false;
}
}

package Jing;

public class Student {
    private static int count=1000;
    int sno;
    //String sno
    String name;
    public Student(String name) {
        super();
        sno=++count;
        //++count
        //sno="hit00"+count
        this.name = name;
    }
    public void showInfo(){
        System.out.println("学号"+sno+"姓名"+name);
    }

}

package Jing;

public class TestPerson {

    public static void main(String[] args) {

Person p=new Person();
p.name="张飞";
System.out.println(Person.history);
p.history="10000年前还是猴子";
Person p1=new Person();
p1.name="王权";
System.out.println(p1.history);
System.out.println(Shuxue.PI);
System.out.println(Shuxue.isPrime(12));

for(int i=0;i<10;i++){
    Student s=new Student("张飞"+i);
    s.showInfo();
}

    }

}