代碼塊

public static void main(String[] args){
	{
		int num = 10;
		System.out.println(num);
	}
	System.out.println(num);//編譯錯誤 因為num只活在上面那個局部代碼塊中
}

class student{
	//構造代碼塊 
	{
		System.out.println("student's構造代碼塊");
	}
	public student(){ 
		System.out.println("空參");
	}
	public student(int num){
		System.out.println("帶參");
	}
}

class student{
	static String school;
	//靜態代碼塊 
	static {
		//靜態方法只能調用靜態成員
		school = "學校";
		System.out.println("student's靜態代碼塊");
	}
	public student(){ 
		System.out.println("空參");
	}
	public student(int num){
		System.out.println("帶參");
	}
}