我是Java的新手,我想知道为什么我的静态块没有执行。
public class Main {
public static void main(String[] args) {
Account firstAccount = new Account();
firstAccount.balance = 100;
Account.global = 200;
System.out.println("My Balance is : " + firstAccount.balance);
System.out.println("Global data : " + Account.global);
System.out.println("*******************");
Account secondAccount = new Account();
System.out.println("Second account balance :" + secondAccount.balance);
System.out.println("Second account global :" + Account.global);
Account.global=300;
System.out.println("Second account global :" + Account.global);
Account.add(); }
}
public class Account
{
int balance;
static int global;
void display()
{
System.out.println("Balance : " + balance);
System.out.println("Global data : " + global);
}
static // static block
{
System.out.println("Good Morning Michelle");
}
static void add()
{
System.out.println("Result of 2 + 3 " + (2+3));
System.out.println("Result of 2+3/4 " + (2+3/4));
}
public Account() {
super();
System.out.println("Constructor");
}
}
我的输出是:
Good Morning Michelle
Constructor
My Balance is : 100
Global data : 200
*******************
Constructor
Second account balance :0
Second account global :200
Second account global :300
Result of 2 + 3 5
Result of 2+3/4 2
我想知道为什么当我使用第二个帐户时未显示“早安米歇尔”。
根据我所做的研究,此静态块应在每次调用类(新帐户)时执行。
对不起真正的初学者问题。
蜜雪儿
最佳答案
打印“Good Morning Michelle”的静态块是static initializer。当首次引用该类时,每个类只能运行一次。创建该类的第二个实例不会使它再次运行。