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# 對象的創建

* 給對象分配內存
* 線程安全性問題
* 初始化對象
* 執行構造方法

![](https://img.kancloud.cn/ef/81/ef81a30861315adc73c38a006c5a0a0a_405x780.png)


# 對象的結構

對象在內存中存儲的布局可以分為3塊區域

* Header(對象頭)
    - 自身運行時數據
       - 哈希值
    - 類型指針

* Instance(實例數據)

* Padding(對齊填充)










                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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