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String a = null, it will only save a string type in the stack pointer, but the pointer is not just to any string heap.
String a = string. The Empty, in addition to save a string type in the stack pointer, the pointer points to the string data of pile, the Empty string, the string and a = "";Is the same.
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String a = null, it will only save a string type in the stack pointer, but the pointer is not just to any string heap.
String a = string. The Empty, in addition to save a string type in the stack p...