public?class?HelloWorld?{
????
????String?name;?//?聲明變量name
String?sex;?//?聲明變量sex
static?int?age;//?聲明靜態(tài)變量age
????
????//?構(gòu)造方法
public???HelloWorld()?{?
System.out.println("通過(guò)構(gòu)造方法初始化name");
name?=?"tom";
}
????
????//?初始化塊
{?
System.out.println("通過(guò)初始化塊初始化sex");
sex?=?"男";
}
????
????//?靜態(tài)初始化塊
???static?????{?
System.out.println("通過(guò)靜態(tài)初始化塊初始化age");
age?=?20;
}
????
public?void?show()?{
System.out.println("姓名："?+?name?+?"，性別："?+?sex?+?"，年齡："?+?age);
}
????
public?static?void?main(String[]?args)?{
????????
????????//?創(chuàng)建對(duì)象
HelloWorld?hello?=?new?HelloWorld();
//?調(diào)用對(duì)象的show方法
????????hello.show();
????????
}
}
2016-10-20
對(duì)象.方法
2016-10-21
打印輸出對(duì)象的三個(gè)屬性
2016-10-20
調(diào)用一個(gè)方法