为什么在 Java 中对象是在堆上而不是在堆栈上创建的？

Question

What was the reasoning behind this decision? Why dynamically make objects on the heap and not on the stack? By doing it on the are we saving space?

Answer 1

If you allocate an object on the stack, its life time is limited to the current method call. When the method returns, the object is automatically destroyed, together with everything else stored in the stack frame. This means it's impossible to write a function that returns an object, or a function that adds a new object to a list.

You could make it work by copying or moving the object like c++ does. But then you have to deal with the complexity of C++. Java was supposed to be simpler than that.