英文:
What is the difference between Obj obj =new Obj (); and Obj obj;
问题
在Java中，`Obj obj = new Obj();` 和 `Obj obj;`（未进行实例化）之间有什么区别？
```java
public class Obj {
int a = 1;
public static void main(String[] args) {
Obj obj = new Obj();
Obj obj1;
// TODO Auto-generated method stub
}
}
英文:
What is the difference between Obj obj =new Obj (); and Obj obj; (without instantiation)
in java
public class Obj {
int a =1;
public static void main(String [] args) {
Obj obj =new Obj ();
Obj obj1;
// TODO Auto-generated method stub
}
}
答案1
得分: -1
Obj obj = new Obj(); - 在这里创建了对象，并且创建了对 Obj 的引用，即 obj。由于我们使用了 new Obj()，在这种情况下将分配内存。
Obj obj1; - 在这里创建了 Obj 的引用，即 obj1。在这种情况下不会分配内存。
希望这能帮助您。
英文:
Obj obj = new Obj(); - Here the object is created and the reference of Obj is created which is obj. Since we have used new Obj(), memory will be allocated in this case.
Obj obj1; - Here reference of Obj is been created which is obj1. In this case memory will not be allocated.
Hope this helps
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