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("通過構(gòu)造方法初始化name");
??name = "tom";
?}
?????
??? // 初始化塊
?{
??System.out.println("通過初始化塊初始化sex");
??sex = "男";
?}
???
??? // 靜態(tài)初始化塊
????? static?? {
??System.out.println("通過靜態(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)建對象
??HelloWorld hello = new HelloWorld();
??// 調(diào)用對象的show方法
??????? hello.show();
???????
?}
}