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Lesson4_12.java
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/**
代碼塊
1.普通代碼塊,在方法中寫的代碼塊
2.構造塊是在類中定義的代碼塊,在創建對象時被調用,優於構造方法執行
3.靜態代碼塊,在第一次使用的時候(創建對象),只會執行一次,優於構造塊執行,
我們在項目開發中,通常會使用靜態代碼塊來初始化只調用一次的數據,比如說:
小結:重點會使用的順序是靜態代碼塊,普通代碼塊,同步代碼塊,構造代碼塊
*/
public class Lesson4_12{
public static void main(String[] args){
Student s = new Student();
}
}
class Student{
static{
System.out.println("我是靜態代碼塊");
}
{
System.out.println("我是構造");
}
public Student(){
System.out.println("構造方法");
}
public void study(){
//限制作用域
{
int i=10;
System.out.println("我是普通");
}
}
}
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