package day2;

import org.junit.Test;

public class ClassDemo1 {
//程式經過javac.exe生成.class位元組碼檔案
//用java.exe解釋執行某個位元組碼檔案，相當於將其載入到記憶體中，此過程為類的載入，該類為執行時類
//Class例項對應著執行時類
@Test
public void test1() throws Exception {
Person p1=new Person("張三",20);
//3種方式獲取Class例項
Class c1=Person.class;
System.out.println(c1);
Class c2=p1.getClass();
System.out.println(c2);
//通過類的路徑
Class c3=Class.forName("day2.Person");
System.out.println(c3);
}
}

class Person {
private String name;
public int age;

public Person(String name, int age) {
    this.name = name;
    this.age = age;
}
private Person(String name) {
    this.name = name;
}
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;
}
@Override
public String toString() {
    return "姓名："+ name + "，年齡：" + age;
}
public String show(){
    return this.name+" , "+this.age;
}
private String showNation(String nation){
    return "我來自"+nation;
}
 

}