public?class?HelloWorld?{
	int?num1;
	int?num2;
	static?int?num3;

	public?HelloWorld()?{
		num1?=?91;
		System.out.println("通過構造方法為變量num1?賦值");
	}

	{
		num2?=?74;
		System.out.println("通過初始化快為變量num2賦值");
	}
	{
		num3?=?83;
		System.out.println("通過靜態初始化為靜態變量num3賦值");
	}

	public?static?void?main(String[]?args)?{
		//?TODO?Auto-generated?method?stub
		HelloWorld?hello?=?new?HelloWorld();
		System.out.println("num1:"?+?hello.num1);
		System.out.println("num2:"?+?hello.num2);
		System.out.println("num3:"?+?num3);
		HelloWorld?hello2?=?new?HelloWorld();
	}

}

通過初始化快為變量num2賦值

通過靜態初始化為靜態變量num3賦值

通過構造方法為變量num1 賦值

num1:91

num2:74

num3:83

通過初始化快為變量num2賦值

通過靜態初始化為靜態變量num3賦值

通過構造方法為變量num1 賦值

和老師給的答案不一樣